A new element was discovered. It’s average atomic mass was found to be 245.6 amu. Isotope #1 has a mass of 243.2 amu; isotope #2 has a mass of 244.9 amu; isotope #3 has a mass of 247.2 amu. Which isotope is most likely to be the most abundant?

A
Isotope 1

B
Isotope 2

C
Isotope 3

D
They all contribute the same amount

Answers

Answer 1

Answer:

B. Isotope 2

Explanation:

Isotopes can be defined as the atom of an element that has the same number of protons but different number of neutrons. This ultimately implies that, the isotopes of an element have the same atomic number (number of protons) but different atomic mass (number of nucleons).

Basically, the atomic mass of any chemical element found in the periodic table is equal to the weighted average of all its isotopes. Therefore, the isotope with the closest mass to the weighted average would be the most abundant.

In this scenario, a new element was discovered with an average atomic mass of 245.6 amu.

Isotope #1 has a mass of 243.2 amu.Isotope #2 has a mass of 244.9 amu.Isotope #3 has a mass of 247.2 amu.

Hence, the isotope which is most likely to be the most abundant is isotope #2 that has a mass of 244.9 amu because it is closest in mass to the relative atomic mass (weighted average) of 245.6 amu.


Related Questions

What type of reaction heats the water to generate steam in a nuclear power plant

Answers

Fission! Nuclear power plants heat water to generate steam. The steam is used to spin big turbines that create electricity. Nuclear power plants use heat produced during nuclear fission to heat water which becomes steam. In nuclear fission, atoms are split apart to form smaller atoms, releasing energy. Hope this helps!

Which statement describes all chemical changes, but not all physical changes?

Answers

Answer:

A new substance forms.

Explanation:

Answer:

B

Explanation:

An enzyme can catalyze a reaction with either of two substrates, S1 or S2. The Km for S1 was found to be 2.0 mM, and the Km, for S2 was found to be 20 mM. A student determined that the Vmax was the same for the two substrates. Unfortunately, he lost the page of his notebook and needed to know the value of Vmax. He carried out two reactions: one with 0.1 mM S1, the other with 0.1 mM S2. Unfortunately, he forgot to label which reaction tube contained which substrate. Determine the value of Vmax from the results he obtained:
Tube number: 1
Rate of formation of product:0.5
Tube number: 2
Rate of formation of product: 4.8

Answers

Answer:

100.5 ≈ 101

Explanation:

Km for S1 = 2.0 mM

Km for S2 = 20 mM

Given that : S1 = S2 =  hence Vmax for either S1 or S2 can represent

The Vmax can be calculated using the data Given and equation below

Vo = Vmax [s] / ( Km + [s] )  ------ (1)

Vo = 0.5

[s] = 0.1 mM

km = 20 mM

making Vmax subject of  equation 1

Vmax = 0.5 ( 20.1 mM) / (0.1 mM )

         = 100.5 ≈ 101

How does energy (heat) flow in the ocean?​

Answers

Answer:

There is a connection between the ocean and the atmosphere (they work together to move heat and fresh water across the globe) . Heat can be  transferred between the surface of a sea or ocean and the atmosphere through ;

RadiationConvection,Turbulent heat exchange Evaporation of waterCondensation of water vapor above the sea or ocean .

Explanation:

Which reason best explains why metals are malleable?
A. because they have delocalized electrons
B. because they have localized electrons
C. because they have ionic bonds
D. because they have rigid bonds

Answers

Answer:

A

Explanation:

because they have delocalized electrons

Metals are malleable because they have delocalized electrons which are capable of forming ionic bonds.

What is an ionic bond?

Ionic bond or electrovalent bond is a type of bond which is formed between two elements when there is an exchange of electrons which takes place between  the atoms resulting in the formation of ions.

When the atom looses an electron it develops a positive charge and forms an ion called the cation while the other atom gains the electron and develops a negative charge  and forms an ion called the anion.

As the two atoms are oppositely charged they attract each other which results in the formation of a bond called the ionic bond.Compounds having ionic bonds are malleable and have high melting points.They are also brittle in nature.

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An element is lustrous, brittle, and silver colored. What type of element is it
Metal
Metalloid
Non Metal
Other
Will give brainlist

Answers

Metal, since some metals can be brittle

What is the volume of 26.1 g of a substance if the density of the substance is 0.28 g/mL?

Answers

Answer:

It is 93.2

Explanation:

It's that answer because if you divide volume and density that's what you get

Mass and energy are conserved
Question 16 options:

A)

only in chemical changes.

B)

in chemical changes and physical changes.

C)

always in physical changes and sometimes in chemical changes.

D)

only in physical changes.
Question 17 (5 points)
Which of the following can't be broken down any further chemically?
Question 17 options:

A)

Compounds

B)

Elements

C)

Matter

D)

Molecules
Question 18 (5 points)
A/an _______ is the smallest unit of matter that has the characteristics of a chemical element.
Question 18 options:

A)

atom

B)

proton

C)

molecule

D)

electron
Question 19 (5 points)
The distance between consecutive peaks or troughs in a wave is
Question 19 options:

A)

frequency.

B)

displacement.

C)

amplitude.

D)

wavelength.
Question 20 (5 points)
The phase transition of dry ice (frozen carbon dioxide) to gas is an example of
Question 20 options:

A)

condensation.

B)

sublimation.

C)

deposition.

D)

vaporization.

Answers

Explanation:

16 A. 17C matter 18C molecule 19D wavelength 20 C deposition

Living things help contribute to the water cycle.
A. true
B.false

Answers

A. hahwjwkwjwbwnkwwk
Answer: A

Living things are apart of the cycle

I NEED AN ANSWER PLEASE!
A element is having atomic number 82. find the number of its protons and electrons

Answers

Answer:

the element is lead

Explanation:

the atomic number of lead is 82.

number of protons 82

number of electrons 82

A substance is examined under a high-power electron microscope. The substance is found to contain only one type of atom.
What is the substance?
compound
O element
mixture
solution

Answers

Answer:

It is a solution

Explanation:

I know that because a solution is something you mix and you have to use a microscope if you really wanna see what's in there

Sanjay is learning about the elements that make up Earth’s crust. Ms. Richards, his Earth science teacher, gives him an element and asks him to determine which element from Earth’s crust it is. She also provides Sanjay with this table. Sanjay weighs the element and finds that it has a mass of 17.98 g. By placing the element in water, he determines the volume of the substance to be 2.2835 mL.

Based on the table from Ms. Richards, what element from Earth’s crust did Ms. Richards gave to Sanjay?
A) iron
B) calcium
C) aluminum
D) silicon

Answers

Answer:

Iron

Hope this helps! Stay safe!

(Plz vote me as brainliest)

Answer:iron

Explanation:

2.3 grams of sodium reacts with water and 0.080 grams of hydrogen has been collected what are the theoretical and percent yields of hydrogen gas?

Answers

Answer:

Theoretical yield = 0.1 g

Percent yield = 80%

Explanation:

Given data:

Mass of sodium = 2.3 g

Actual yield of hydrogen = 0.080 g

Theoretical yield = ?

Percent yield = ?

Solution:

Chemical equation:

2Na + 2H₂O    →  H₂ + 2NaOH

Number of moles of sodium:

Number of moles = mass/ molar mass

Number of moles = 2.3 g/ 23 g/mol

Number of moles = 0.1 mol

Now we will compare the moles of sodium with hydrogen to calculate the theoretical yield.

                       Na               :              H₂

                        2                :               1

                     0.1                 :             1/2×0.1 = 0.05 mol

Mass of hydrogen produced:

Mass = number of moles × molar mass

Mass = 0.05 mol × 2 g/mol

Mass = 0.1 g

Percent yield of hydrogen:

Percent yield = actual yield / theoretical yield ×100

Percent yield = 0.08 g/ 0.1 g×100

Percent yield = 0.8×100

Percent yield = 80%

how many moles of methane are there in a 10g sample?​

Answers

 1 grams Methane is equal to 0.062334579609362 mole. Note that rounding errors may occur, so always check the results. 

A sample is left on the desk over several hours. On examination, the crystals appear moist, andliquid is forming around them. The compound is classified as:

a. Stableb.
b. Deliquescent
c. Efflorescentd.
d. Hygroscopic

Answers

Answer:

c. Efflorescent

Explanation:

Some hydrated salts, when exposed to the atmosphere, give off part of all of their water of crystallization spontaneously to form a lower dehydrated or anhydrous salt. Such salts are known as efflorescent and the phenomenon is called Efflorescence.

Efflorescence occurs when the hydrate's aqueous vapor pressure is greater than the water vapor's partial pressure in the air. For example, because the vapor pressures of washing soda (Na2CO3·10H2O) and Glauber's salt (Na2SO4·10H2O) normally exceed that of the water vapor in the atmosphere, these salts effloresce (i.e., lose all or part of their water of hydration), and their surfaces assume a powdery appearance.

Enter your answer in the provided box.
A sample of chlorine gas is confined in a 7.17-L container at 491 torr and 37.0°C.
How many moles of gas are in the sample?
mol Cl2

Answers

Answer: 0.182 mols Cl2
Hope this helps! :)

12. (01.06 LC)
Which of the following is a property of a pure substance? (5 points)
It consists of different types of compounds.
It may have substances in different states of matter,
It is made up of a single element or type of compound,
Its components can be separated by employing physical methods.

Answers

Answer:

3rd one

Explanation:

dont have one, i think just think it makes most sense

Answer:It is made up of a single element or type of compound

Explanation: This answer is right because for something to be pure it has to only be made up of 1 thing.

Your advisor has given you a tube of GMP that has been sitting in the freezer for many years and wants to know the concentration. There is one problem: the spectrophotometer in the lab has been 'optimized' for use with proteins and only measures at 280 nm. You decide to give it a try. After getting and absorbance reading of 0.2, what is the concentration of GMP in the tube (assuming a 1 cm path length).

Answers

Answer:

2.22 × 10^-5M

Explanation:

From Beer-Lambert's law;

A=εcl

Where A = absorbance of GMP= 0.2

ε= molar extinction coefficient of GMP = 9000 M-1cm-1

c= concentration of GMP= the unknown

l= path length = 1 cm

c= A/εl = 0.2/ 9000 M-1cm-1 × 1 cm

c= 2.22 × 10^-5M

Which part of a flower can make eggs

Answers

Within the flower, sperm cells are produced by pollen at the tips of stamens, while egg cells develop in ovules, tiny structures embedded in the ovary at the base of the pistil.

Answer:Within the flower, sperm cells are produced by pollen at the tips of stamens, while egg cells develop in ovules, tiny structures embedded in the ovary at the base of the pistil.

I didn't realize the person up top had the same answer give them the brainliest! :)

1. What is the mass of a rock that has a density of 2.5 grams per cubic centimeter and a volume of 4.0
cubic centimeters?
What is the mass

Answers

Answer:

Explanation:

d =

m

V

m = d×V

V =

m

d

DENSITY

Density is defined as mass per unit volume.

d =

m

V

Example:

A brick of salt measuring 10.0 cm x 10.0 cm x 2.00 cm has a mass of 433 g. What is its density?

Step 1: Calculate the volume

V = lwh = 10.0 cm × 10.0 cm × 2.00 cm = 200 cm³

Step 2: Calculate the density

d =

m

V

=

433

g

200

c

m

³

= 2.16 g/cm³

MASS

d =

m

V

We can rearrange this to get the expression for the mass.

m = d×V

Example:

If 500 mL of a liquid has a density of 1.11 g/mL, what is its mass?

m = d×V = 500 mL ×

1.11

g

1

m

L

= 555 g

VOLUME

d =

m

V

We can rearrange this to get the expression for the volume.

V =

m

d

Example:

What is the volume of a bar of gold that has a mass of 14.83 kg. The density of gold is 19.32 g/cm³.

Step 1: Convert kilograms to grams.

14.83 kg ×

1000

g

1

k

g

= 14 830 g

Step 2: Calculate the volume.

V =

m

d

= 14 830 g ×

1

c

m

³

19.32

g

= 767.6 cm³

The mass of rock is 10 g.

We have sample of rock.

We have to determine its mass.

How is density and mass of body related ?

The density and mass of body are related as follows -

D = M / V

where -

V -  volume of the body.

M - mass of the body.

D - density of the body.

According to the question →

Using the formula discussed above -

D = M / V

M = D x V

M = 2.5 x 4 = 10 g

Hence, the mass of rock is 10 g

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How are contact forces and non-contact forces similar?

Answers

Answer:

Difference between Contact and Non-Contact Forces

There is no field linked with the contact force. There is always a field linked with non-contact force. The frictional force is an example of a contact force. Gravitational force is an example of a non-contact force.

Explanation:

And it is physics not chem.

Hope this helps u

Crown me as brainliest:)

Which is the larger atom kr Or As

Answers

Answer:

I think As is larger

Explanation:

How many electrons are present in one neon
atom?

Answers

Answer:  10 electrons

That means there are 10 electrons in a neon atom. Looking at the picture, you can see there are two electrons in shell one and eight in shell two. Because shell two has eight electrons it is now full.

Explanation: Hopefully this helped!

which type of matter is represented by the particle diagram

Answers

Answer:

a compound

Explanation:

A compound




Explanation: I’m BIGGER BRAIN THAN THEM ALL!

2. Using the following data, calculate the average atomic mass of magnesium (give your answer to the nearest
.01 ) : Show all work!
Isotope: Mg Percent abundance: 78.70%
24
Isotope: 'Mg Percent abundance: 10.13% 25
Isotope: Mg Percent abundance: 11.17% 26

Answers

Answer: 24.309amu

Explanation:

is a granite a mineral or a rock

Answers

mineral because its not a rock

Answer:

Rock

Step-by-step explanation:

It's an igneous rock

I hope this helps!

Give an example of experimental bias

Answers

Answer:

chongus because he's the only good one

1. A camper named Bob ran into aliens on a trail. Bob made friends with the aliens so he could
steal their treasure of 1 zygot.
1 zygot = 3 trigots
3 trigots = 2 bigots
4 bigots = 1 gram gold
How many grams of gold did Bob take from the aliens?

Answers

Answer : The number of grams of gold Bob take from the aliens will be 0.5.

Explanation :

As we are given that:

1 zygot = 3 trigots

3 trigots = 2 bigots

4 bigots = 1 gram gold

Now we have to determine the number of grams of gold Bob take from the aliens.

The number of grams of gold Bob take from the aliens will be equal to:

[tex]\frac{1\text{ zygot}}{1}\times \frac{3\text{ trigots }}{1\text{ zygot}}\times \frac{2\text{ bigots }}{3\text{ trigots }}\times \frac{2\text{ gram gold}}{4\text{ bigots }}[/tex]

= [tex]\frac{6}{12}[/tex] gram gold

= [tex]\frac{1}{2}[/tex] gram gold

=  0.5 gram gold

Hence, the number of grams of gold Bob take from the aliens will be 0.5.

ASAP. I will give brainlies to right answer!!! Three grams of the same substance in different phases are stored in three different containers. Each container is barely large enough to hold the substance.

Which statement can be known about the behavior of the atoms in each container?

The atoms in the solid would be moving vigorously around the container.
The atoms in the liquid would be vibrating in position.
The atoms in the solid would be vibrating in position.
The atoms in the gas would be moving slowly around the container.

Answers

Answer:

The atoms in the solid would be vibrating in position.

Explanation:

i took the test

Three grams of the same substance in different phases are stored in three different containers. Each container is barely large enough to hold the substance. Therefore, the correct option is option B.

What is atom?

Atom, the smallest unit of matter that may be separated without releasing electrically charged particles. It is also the tiniest unit of matter with the characteristics of a chemical substance. As a result, the atomic is the fundamental building component of chemistry.

The majority of the molecule is empty space. The rest of the structure is made up of a positive-charged nucleus of neutrons and protons surrounding by a swarm of negative-charged electrons. In comparison to electrons, the lightest charge particles in nature, nuclear nucleus is small yet dense. The atoms in the liquid would be vibrating in position.

Therefore, the correct option is option B.

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I need help with these 2 problems ASAP please.
This is not chemistry but i could not find science
(THIS QUESTION IS FOR SCIENCE)

Answers

i think the answer for the first question is sickle-cell anemia and second question is phenylketonuria (PKU)

Answer:

1. is sickle-cell anemia and 2. is phenyketonuria

Explanation:

Other Questions
Which expression is equivalent to 18 - 7?A. -18 + 7B. 18+ (-7)C. 18 + 7D. -18 +(-7) Please helpText: but more important by far is the abundant testimony about Conrads savages which we could gather if we were so inclined from other sources and which might lead us to think that these people must have had other occupations besides merging into the evil forest or materializing out of it simply to plague Marlowe and his dispirited band.For as it happened ,soon after Conrad had written his book an event of far greater consequences was taking place in the art world of Europe. This is how Frank Willet ,a British art historian describes it:Gauguin has gone to Tahiti the most extravagant individual act of turning to a non-European culture in the decades immediately before and after 1900, when Europeans artists were avid for new artistic experiences, but it was only about 1904-5 that African art began to make its distinctive impact. one piece is still identifiable; it is a mask that has been given to Maurice Vlaminck in 1905. He records that Derain was speechless and stunned when he saw it, bought it from Vlaminck and it showed it to Picasso and Matisse,who were also greatly affected by it.Ambroise Vollard then borrowed it and had it cast in bronze...Th revolution of twentieth century art under way! The mask in question was made by other savages living just north of Conrads River Congo.They have a name too: the fang people,and are without a doubt among the worlds greatest masters of the sculptured form.The event Frank Willet is referring to marked the beginning of cubism and the infusion of new life into European art that had run completely out of strength. The point of all of this is to suggest Conrads picture of the peoples of the Congo seems grossly inadequate even at the height of their subjection to the ravages of King Leopolds International Association for the Civilazation of Central America. QUESTIONS: What claim does Achebe make in this passage?A: Conrads depiction of Africans Is not accurate B: Willets depiction of African culture is fairC: Conrad and Willet both dehumanize Africans What type of evidence does Achebe use to support this claim? A: anecdotal B: textualC: historicalHow does the evidence support the claim?A: it contrasts Conrads limited viewpointB: its supports Conrads perspectiveC: its denies claims that Conrad is racist 1. Un saldo 2. La talla3.me queda 4. calzar/ nmero que calzas Choices: Shoe size , sale , Its fits me, size for clothing Ill give brainliest only if your right!!!! Which elements are important to include in the conclusion of an argumentative editorial? Check all that apply.a restatement of the claima list of evidence used to support the claima personal opinion about the topica summary of the rebuttala solution, an alternative, or a call to action According to your reading, pastoral people had to be able to adapt to changes in _____.geographyclimaterivers Alex is in Boston studying for _____ MBA. h e l p meee- Which describes the life of an indentured servant in colonial times?Choose all of the answers that are correct.A. legally bound to the employer for a set amount of timeB. spent evenings reading or entertaining guestC. had to do whatever job were assigned D. viewed as someone's property for life please help me, ASAP FIRST ACCURATE ANSWER GETS BRAINLIESTWhat system promoted economic growth between the colonies and other nations? Group of answer choicesSquare TradeIndentured servantsReligious freedomTriangular Trade who has read the crucible? In the sentence, "Tim read Moby a bedtime story," what is the indirect object? plz plz help i promise i will mark brainliest True or False: The mouse bit Jack. ifykyk Northern Ireland is _______.A.ruled by BritainB.ruled by IrelandC.independentD.ruled by France Will mark Brainliest, 15 points. Easy question.The point slope form of the line that passes through (-4, -3) and (12, 1) is y - 1 = 1/4 ( x - 12). What is the standard form of the equation for this line?A). X - 4y = 8B). X - 4y = 2C). 4x - y = 8D). 4x - y = 2 If your RHR (Resting Heart Rate) is 23 beats per 20 second, what is the rate per minute (BPM)?Please help!!!!! HELP!!! DUE IN 38 MINUTES 11:22 due at 11:59pm pst how long the Middle Kingdom lasted, as compared to the other Kingdoms. How is an excise tax different from a sales tax?A). An excise tax is not deductible.B). An excise tax applies to specific products.C). An excise tax applies only to imported goods.D). An excise tax is an indirect tax. Jayden starts with $1575 in a college savings account. His account earns interest at a rate of 2.7% compounded annually. How much money is in the account after 9 years?