What element has an energy level Electron Configuration of 2-8-18-8?

Argon
Calcium
Krypton
Chlorine

Answers

Answer 1

answer:

krypton.

explanation:

it is a noble gas, so has full-valence shell. also, reference back to the periodic table.

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Related Questions

what is the molar mass of p4010? solve ​

Answers

Answer:

283.889044 g/mol

The molar mass of P4 O10 is 283.889044 g/mol. Adding the molar mass of each element gives us the molar mass of the compound.

Explanation:

Does gasoline (C8H12) have polar or non-polar molecules?

Answers

Answer:

non polar molecules

Explanation:

Ethyl alcohol will dissolve in water in all proportions because the polar molecules interact with each other freely. In contrast, gasoline is a nonpolar molecule.  hope that helped...

Ionic bonds form between _____ which form positively charged ions and _____ which form negatively charged ions.

Answers

ionic bonds form between metals which form positively charged ions and nonmetals which form negatively charged ions.

As the radius of a star increases, how do you think its mass might change?

Answers

Answer:

by wind

Explanation:

As the radius of the star increases, the mass will also increase.

This is all about the relationship between the radius and mass of stellar main sequence stars.

Now, usually they are expressed in solar units and as such as seen in the graph image attached, the relationship between the radius(R) and mass(M) of a main-sequence star is seen by the curve attached. It is clear that the higher the radius becomes, the larger the mass of the star also becomes.

To clarify this also, we have a mass - lumosity relationship formula where given as;

L = [tex]M^{3.5}[/tex]

Where;

M is mass

L is lumosity

We know from basics of stellar main sequence stars, that a larger radius gives a much brighter lumosity.

From the mass-lumosity formula, we see that Increase in lumosity is directly proportional to an increase in mass. Therefore in the same vein, we can say that increase in radius is directly proportional to an increase in mass.

read more at; brainly.com/question/20400571

25.00 g of the compound is composed of 6.77 g of tin and 18.23 g of bromine. What is the percent by mass of tin in the compound? Show work.

Answers

The percent by mass of Tin : = 27.08%

Further explanation

Given

25.00 g of the compound

6.77 g of Tin

18.23 g of Bromine

Required

The percent by mass of Tin

Solution

Proust stated the Comparative Law that compounds are formed from elements with the same Mass Comparison, so that compounds have a fixed composition of elements

%mass X = (mass X/mass sample) x 100%

So %mass of Tin :

= (6.77 g : 25 g) x 100%

= 27.08%

The table shows the recipe and the available ingredients for making the maximum possible number of sandwiches.
Making Sandwiches
Recipe for One Sandwich
Total Ingredients Available
1 cheese slice, 2 lettuce leaves, 2 bread slices Total ingredients available: 8 cheese slices, 6 lettuce leaves, 6 bread slices
If the ingredients represent reactants of a chemical reaction, which of the following represents the leftover reactant?
OTwo cheese slices
Two lettuce leaves
Five lettuce leaves
Five cheese slices

Answers

Answer:

5 Cheese Slices

Explanation:

I took the quiz and got it right.

Answer:

Five cheese slice

Explanation:

8-1-1-1=5

We are slowly learning that even if we react, it won't change anything, it won't make people suddenly love and respespect us, it won't magically change their minds. Sometimes it's better to just let things be, let people go, don't fight for closure, don't ask for explanations, don't expect people to understand where you're coming from. We are slowly learning that life is better lived when you don't center it on what's happening around you and center it on what's happening inside you instead.
Work on yourself and you inner peace. ​

Answers

Answer:

wow ok ill try to

Explanation:

this is the most beautiful thing ive seen all day

thank you


which one would it be?

Answers

Answer:

1 chlorine and 2 hydrogen

Explanation:

because in the picture you already have a hint wichbis chlorine so that eliminiates C and D

and its 2 hydrogens because if it were 1 then there wouldn't be anything adding in the chemical equation

Fe2 O3 = Al =Fe Al2 O3

Answers

you will need to be sure to count all of atoms on each side of the chemical equation. Once you know how many of each type of atom you can only change the coefficients (the numbers in front of atoms or compounds) to balance the equation for Aluminum + Iron (II) oxide

Calculate the theoretical yield for your reaction. {This is your predicted mass of CuO produced based on the starting mass of CuCO3Cu(OH)2}

Identify the Experimental Yield of your reaction (the amount that actually got produced and measured)

Calculate the percent yield of your reaction (refer to the introduction)

Evaluate your percent yield – state at least one legitimate reason your yield could be higher or lower than 100%. Be specific (the experimental error is not specific enough, for example)

Answers

Answer:

CuCO3Cu(OH)2 overlapping yield calculate itCuCO3Cu(OH)2 overlapping yield calculate it

holy sheesh dude

Explanation:

CuCO3Cu(OH)2 overlapping yield calculate it

Define the terms heredity and inherited in your own words.

Answers

Answer:

Heredity is when you have gotten either physical or mental traits from your parents.

Inherited in Biology: Getting traits from your parents

Inherited outside Biology: is the practice of passing on private property, titles, debts, privileges, rights, and obligations upon the death of an individual.

Explanation:


help plz and can you plz use terms

Answers

I’m not sure but I hope yu get the right answer sorry

Calculate the sodium ion concentration when 70.0 mL of 3.0
M sodium carbonate is added to 30.0 mL of 1.0 M sodium
bicarbonate.

Answers

Answer:

4.5 M Na+

Explanation:

Multiply the molarity by the volume of the solution to get moles.

Note that there are TWO sodium ions in sodium carbonate, therefore the first-mole calculation must be multiplied by two.

Since molarity is defined as moles of ions/liters of solution, the final molarity will be the sum of the calculated moles divided by the sum of the liters of solution.

Hope this helps :)

In the reaction Cu(s) + 2 AgNO3(aq) -> 2 Ag(s) + Cu(NO3)2(aq) how much Ag can be produced from 49.1 g of copper

Answers

Answer:167.9 g Ag

Explanation: 1 mol Cu + 2 mol AgNO3 = 2 mol Ag + 1 mol Cu(NO3)2

63.55 g Cu —> 2*107.688 g Ag

So 49.1 g Cu —> (49.1/63.55)*2*107.688 = 167.9 g Ag

Which of the following atoms would have a charge of +1?
An atom with 9 protons, 9 electrons, and 9 neutrons
An atom with 7 protons, 11 electrons, and 8 neutrons
An atom with 5 protons, 5 electrons, and 4 neutrons.
An atom with 6 protons, 5 electrons, and 7 neutrons

Answers

Answer: An atom with 6 protons, 5 electrons, and 7 neutrons

Explanation: In this case, neutrons do not matter as they have a charge of 0, or no charge. A proton has a charge of +1 and an electron has a charge of -1. Since there are 6 protons, the total charge of the protons would be +6. Since there are 5 electrons the total charge of the electrons would be -5. +6 - 5 would result in a charge of +1. This means that this atom would have an overall charge of + 1. Basically, if there is one more proton than electron, then the overall charge of the atom will be +1 but if there is one more electron than proton, then the overall charge of the atom will be -1.

Which best describes the effect of a ecosystem when populations of white-tailed deer are overhunted by people in an area?

A. It disrupts the balance between predators and prey
B. It decreases the amount of producers
C. It directly increases the population of decomposers
D. It decreases competition for food among carnivores

Answers

Answer:

A. It disrupts the balance between predators and prey

Explanation:

The effect on the ecosystem when populations of white  - tailed deer are overhunted is that it disrupts the balance between predators and prey within the ecosystem.

The whited - tailed deer is the usually the prey. The carnivores are the cats and other flesh eating animals. When the deer is over-hunted, there are more predators compared to prey. This leads to a serious imbalance and a high level of competition for the scarce prey.

1.2 dkg to grams now I have to say extra stuff for it to submit

Answers

Answer:

12 grams and I have to write something longer so just ignore this

The complete combustion of acetic acid, HC2H3O2(I) to form water, H2O(I), and CO2(g), at constant pressure releases 871.7 kJ of heat per mol of acetic acid.
Write a balanced thermochemical equation if 5.0g of acetic acid will be used in the reaction.
HC2H3O2(I) + O2 --- H2O(I) + CO2(g) H= -871.7 kJ

Answers

Answer:

HC2H3O2(I) + O2(g) ---> H2O(I) + CO2(g) ΔH= -72.35 kJ

Explanation:

We know that 5.0 g of acetic acid will contain, 5.0g/60 g/mol = 0.083 moles of acetic acid

Now from the reaction equation;

1 mole of acetic acid evolved -871.7 KJ of heat

0.083 moles of acetic acid will evolve 0.083 * -871.7 = -72.35 KJ

For 5.0 g of acetic acid, we can write;

HC2H3O2(I) + O2(g) ---> H2O(I) + CO2(g) ΔH= -72.35 kJ

What determines an element's properties?

ANSWER: A. The valence electrons

A. The valence electrons

B. The isotopes it forms

C. Its atomic mass

D. The core electrons

Answers

Answer:

b

Explanation:

what is the name and classification of a six sided molecule with oh attached

Answers

Six sided molecule is Glucose

Why must ionic compound have a total charge of 0?

Answers

Iconic compound consists of equal number of positive and negative ions so the charge of icon compound is zero.

Good luck and please can I have brainless because this is a new account and my other one had like 10

Which statement best explains the net transfer of energy that is about to
happen in this photo?
A. The racket and the ball will both gain kinetic energy.
B. The ball will gain kinetic energy, and the racket will lose kinetic
energy
C. The racket will gain potential energy, and the ball will lose kinetic
energy
D. The racket and the ball will both lose potential energy

Answers

Answer:

Explanation:

B I got it right

Answer:

B. The ball will gain kinetic energy, and the racket will lose kinetic

energy

Explanation:

Which of the following represents a solution? *
2 points
NaCl (s)
HCl (aq)
H2O (g)
HBr(g)

Answers

Answer:units of G.

Explanation:Milk of magnesia, a suspension of Mg(OH)2

in water, reacts with stomach acid (HCl) in a

neutralization reaction.

Mg(OH)2(s) + 2HCl(aq) −!

2H2O(l) +MgCl2(aq)

What mass of MgCl2 will be produced if

4.55 g of Mg(OH)2 reacts?

Answer in units of g.

021 (part 2 of 2) 10.0 points

What mass of HCl is required to completely

react with 4.55 g of Mg(OH)2?

Fe0 + 2H+1 Cl-1 → Fe+2 Cl2 -1 + H20 ↑
De acuerdo con la ecuación planteada si se cambia el hierro Fe por dos moles de sodio Na0 probablemente formará
A. 2NaCl + H2
B. NaCl + H2
C. 2NaH + Cl2
D. NaCl2 + H2

Answers

Answer:

A and the answer if we can manage by its formula NaCl H2 but the answer is A

What is the balanced chemical equation for Nitric acid with sodium carbonate

Answers

Answer:

Nitric acid reacts with sodium carbonateto form sodium nitrate, carbon dioxide and water. 2HNO3+Na2CO3→2NaNO3+CO2+H2O.

Why is methanol more soluble in water than butanol

Answers

Answer:

Explanation: The longer the alkyl chain, the less soluble in water is the alcohol. Methanol and ethanol are infinitely miscible in water; propanol and butanol have limited solubility. ... Hydrogen bonding with water thus becomes less viable, and solubility of the long-chain alcohol IN WATER decreases.

Explanation:

Which term represents a chemical reaction?
deposition
combustion
sublimation
vaporization

Answers

Answer:

vaporization

Explanation:

The forces that hold molecules of metals together are stronger than the forces that hold molecules of non -metals together. This means that metals have

Answers

Answer:

Stronger bond as compared to non metals

Explanation:

Question 3
True or False. You must convert grams to moles to do stoichiometry.
True
оо
D
False

Answers

Answer:

True

Explanation:

Sometimes you will need to convert from grams to moles, or moles to grams


In which of the following locations are bacteria often found?

Answers

Answer:  

in the air and soil  

in drinking water

on and inside the human body

Explanation: Hope that helps

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