Answer:
True
Explanation:
There are two ways to tell elements apart from each other: the atomic number or the number of protons. The atomic number tells the number of protons in the element.
For example:
There are two given elements. One has 3 protons and an atomic number of 3 while the other has 7 protons and an atomic number of 7. Which one is Lithium?
Lithium has an atomic number of 3, which means it has three protons, which means Lithium is the one with 3 protons.
How many moles of NaOH are in a 75.89g sample? (mass= 40.01 g) (Show your work)
Answer:
1.896 moles of NaOH-----> 1.90 moles
Explanation:
Written- out Method:75.89 g of NaOH | 1 mole of NaOH
| 40.01 g NaOH = 1.896 -----> 1.90 moles of NaOH
Plug into calculator method:(75.89 g NaOH/ 40.01 g NaOH = 1.896 -----> 1.90 moles of NaOH
why does the uncertainty principle exist ?
Answer:
The uncertainty principle, proposed in 1927 by German physicist Werner Heisenberg, states that the more precisely a particle's position is measured, the less precisely its momentum can be known, and vice versa. ... They wanted to measure the polarization, or orientation, of the photon.
PLEASE HELP I'LL GIVE U BRAINLIEST
Answer:
files
Explanation:
i had to answer the same question
as distance from nucleus increases , energy of shells decreases, correct the wrong statement
as distance from nucleus increases , energy of shells also increases
3
1 point
1
Select ALL of the true statements
An atom of a given element will still be that element if the number of protons changes
Atoms are mostly made of empty space
An atom of a given element will still be that element if the number of electrons changes
OOGOOO
An atom of a given element will still be that element if the number of neutrons changes
Electrons have a negligible mass compared to the rest of the atom
The atoms mass comes mostly from the neutrons
Previous
Answer:
Not 100% sure but...
Explanation:
I know that the second, third and fifth one are correct, not sure if there are any more.
write the addition reaction of butane and bromine
Liquids will boil at a higher temperature when they are at a lower elevation true or false ?
Infer what the term “biogeochemical cycles” means. How do you think the term relates to a food chain?
Answer: Biogeochemical cycles are usually described with box models.
Explanation: Matter flows through trophic levels and elements are recycled among ecosystems using biogeochemical cycles. As nutrients move through ecosystems, the compounds they form are usually transformed.
A man weight 235.0 Ib Express his weight in kg.
How do you find it?
Answer:
The answer is 106.59 and 1 lb = 0.45359237 kg.
Explanation:
The Periodic Table of elements is arranged by:
O atomic mass
O number of neutrons
O number of electrons
O atomic number
Option D, atomic number is the correct answer
Answer:
D. Atomic Number
Explanation:
All of the elements in the periodic table are arranged according to their atomic number.
Which is a dominant trait that Mendel observed in pea plant
A. Bumpy pods
B. Short height
C. Yellow seeds
D. White flowers
it is not A
Answer:
C, yellow seeds
Explanation:
In Mandel's studies, he proved that yellow seeds were to be dominant and green seeds were to be recessive.
Answer:
c. yellow seeds
Explanation:
i toke the test
Use “impact force” in a sentence.
Answer:
The impact force of a car hitting a building can traumatize someones body.
Explanation:
Bromine, a liquid at room temperature, has a boiling point of 58°C and a melting point of –7.2°C. Bromine can be classified as a
compound.
impure substance.
mixture.
pure substance.
Answer:
D. pure substance.
Explanation:
Answer:
:D
Explanation:
PLEASE ANSWER
A train travels at an average speed of 25 miles per hour. How long does it take the train to travel 2000 miles
Answer:
80 hours. 2,000 ÷ 25 = 80
if the gas has a volume of 20 L at a temperature of 25 Celsius what is the volume of the gas when it is heated to 100°C if the pressure remains constant
Answer:
i have no idea
Explanation:
lol
Answer:
this has to do with gas law
Explanation:
Charles law
v1=20
T1=25
V2=?
T2=100
hence V1/T1=V2/T2
V2=V1*T2/T1
V2=20*25/100
V2=5
For the n = 3 electron shell, which of the following quantum numbers are valid? Check all that apply.
Answer:
The valid quantum numbers are l=0, l=-2 and l= 2.
Explanation:
Given that,
n = 3 electron shell
Suppose, the valid quantum numbers are
l = 3
m = 3
l = 0
m = –2
l = –1
m = 2
We know that,
The value of n = 3
Principle quantum number :
Then the principal quantum number is 3. Which is shows the M shell.
So, n = 3
Azimuthal quantum number :
The azimuthal quantum number is l.
[tex]l=0,1,2[/tex]
Magnetic quantum number :
The magnetic quantum number is
[tex]m=-2,-1,0,1,2[/tex]
Hence, The valid quantum numbers are l=0, l=-2 and l= 2.
Answer: I = 0 m = -2 m = 2
Explanation: Edge.
the correct answers to the second part of this are:
n = 1, I = 0, m = 0
n = 3, I = 0, m = 0
n = 5, I = 4, m = -3
Explain what happens if you change the number of protons in an element?
Plzzz helpppp!!!
Answer:
When you change the number of protons in an atom, you will change the atom from one element to a different element. Sometimes, when you add a proton to an element, the element will become radioactive. If you change the number of electrons in an atom, you will get an ion of the element.
Compare and Contrast Heating and
Cooling curves.
Answer: Heating curves show how the temperature changes as a substance is heated up. Cooling curves are the opposite. They show how the temperature changes as a substance is cooled down. Just like heating curves, cooling curves have horizontal flat parts where the state changes from gas to liquid, or from liquid to solid.
Explanation: Have a blessed day hopefully this helped!
HELP ASAP WILL MARK BRAINLIST The diagram below shows what happens during the formation of a compound. The diagram shows two substances joining together to form a third substance.
Which of these substances is a compound?
Group of answer choices
C
A
B
Both B and C
Answer:
C is the answer..
The equation is showing how it is formed, so the answer is on the other side of the equal sign.
There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Therefore, diagram C shows the final compound.
What is chemical Compound?Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.
An ionic compound is a metal and nonmetal combined compound. Ionic compound are very hard. They have high melting and boiling point because of strong ion bond.
The diagram below shows what happens during the formation of a compound. The diagram shows two substances joining together to form a third substance. Diagram C shows the final compound.
Therefore, diagram C shows the final compound.
To learn more about chemical compound, here:
brainly.com/question/26487468
#SPJ2
6. What is NOT an example of a solution?
a. Acetic acid and water
b, soil and water
b. Sugar and water
c. iron and carbon
You will analyze four substances in this lab. Based on their chemical formulas and what you already know about covalent and ionic compounds, make a prediction for each compound.Cornstarch, a carbohydrate consisting of hydrogen, carbon, and oxygen
Answer:
Oil: covalent
Cornstarch: Covalent
Sodium chloride: Ionic
Sodium bicarbonate: Ionic
Explanation:
Covalent compounds are formed by sharing of electrons between non metals whereas ionic compounds are formed by transfer of electrons from metals to non metals.
1. Oil, which is built from the nonmetals hydrogen, carbon, and oxygen: forms a covalent compound by sharing of electrons between non metals hydrogen, carbon, and oxygen. Covalent compounds are insoluble in water.
2. Cornstarch, a carbohydrate consisting of hydrogen, carbon, and oxygen: forms a covalent compound by sharing of electrons between non metals hydrogen, carbon, and oxygen. Covalent compounds are insoluble in water.
3. Sodium chloride (table salt), whose formula is NaCl is formed by transfer of electrons from sodium to chlorine.Ionic compounds are soluble in water.
4. Sodium bicarbonate, whose formula is is formed by transfer of electrons from sodium to .Ionic compounds are soluble in water.
Answer:
Oil, which is built from the nonmetals hydrogen, carbon, and oxygen:
covalent
Cornstarch, a carbohydrate consisting of hydrogen, carbon, and oxygen:
covalent
Sodium chloride (table salt), whose formula is NaCl:
ionic
Sodium bicarbonate (sodium bicarbonate), whose formula is NaHCO3:
ionic
Explanation:
which of the following affects self esteem? O home, school, community and cultural environments O social interactions with family friends and others O media, tv, social networking sites all the above
Answer:
All the above
Explanation:
The electronic structure of the atom X is : 2, 8, 1
A. In which group atom x is found:—————-
B. In which period atom x is found:—————
C. What is the name of atom x:———————-
Answer:
A. grou(I)
B. 3rd period
C. Sodium (Na)
Explanation:
it belongs to group (I) since it has one valence electron
it belongs to 3rd period since it has three energy levels
what is extremely lightweight and exists in a cloud orbiting the nucleus
Answer:
atomic particles
Explanation:
electrons are extremely lightweight and exist in a cloud orbiting the nucleus period the electron cloud has a radius 10,000 times greater than the nucleus according to the Los Alamos national laboratory.
Explain the difference between terms "bonded" and "attracted'
bonded means that the two have come together and are attached together, wheras attracted means that the two like to come close to each other but are not put together
When you mix copper and tin, you make bronze. No chemical reaction occurs.
What is bronze?
O A. An element
B. A compound
O C. An alloy
O D. A molecule
SUBMIT
Answer:
C. Alloy
Explanation:
Bronze is an alloy because the creations of alloys are not chemical reactions. An alloy is made when a metal is combined with another metal or a nonmetal.
What unit do we measure force in?
Answer: Newton
Explanation:
The SI unit of force is the newton, symbol N. The base units relevant to force are: The metre, unit of length — symbol m. The kilogram, unit of mass — symbol kg.
¿Qué podría pasar si la fuerza fuerte no existiera?
Answer:
andariamos flotando
Explanation:
Physical Science A 20-21 - Spencer / Basics of Physical Scier
1. Decide which of the following is the best observation.
The dog ate the bone hiding.
The dog ate the bone hiding under the tree.
The dog ate the bone hiding under the shady tree.
The dog ate the bone.
Answer:
The dog ate the bone hiding under the shady tree.
Explanation:
The best observation is that the dog ate the bone hiding under the shady tree. This is because it provides the most graphic details about the position and activities of the dog.
With this choice, we can properly picture the dog and the relationship it has with the tree. The more information we know about a subject of investigation, the better an observation it affords. Such a well informed observation will make analysis much better.Answer:
The dog ate the bone hiding under the shady tree.
Explanation:
It has the most detail :)
What is the main point of mutation ?
quick please !!
Answer: type of mutation that causes the replacement of a single base nucleotide with another nucleotide of the genetic material, DNA or RNA. The term point mutation also includes insertions or deletions of a single base pair.
Explanation:
Answer:
Mutation is important as the first step of evolution because it creates a new DNA sequence for a particular gene, creating a new allele.
Explanation:
Mutations put new DNA combinations into a population