atoms

Question 1

what are atoms?

Answer 1

a basic building block of chemistry - everything is made of atoms

Question 2

what are elements?

Answer 2

a substance that cannot be broke down into simpler substances by chemical means

Question 3

what are compounds?

Answer 3

a substance made up of two or more chemical elements combined in a fixed ratio

Question 4

what is a mixture?

Answer 4

a combination of two or more substances in any proportion

Question 5

what process separates mixtures?

Answer 5

chromatography

Question 6

what is the relative charge of a proton?

Answer 6

+1

Question 7

what is the relative charge of a neutron?

Answer 7

0

Question 8

what is the relative charge of an electron?

Answer 8

-1

Question 9

what is the charge of an atom?

Answer 9

0

Question 10

what is the relative mass of a proton?

Answer 10

1

Question 11

what is the relative mass of a neutron?

Answer 11

1

Question 12

what is the distribution in the mass of an atom?

Answer 12

most of the mass of an atom is concentrated in its nucleus

Question 13

what are isotopes?

Answer 13

atoms with the same number of protons but different number of neutrons

Question 14

what is relative atomic mass?

Answer 14

the mass of the element

Question 15

how do electrons fill energy levels in atoms?

Answer 15

occupy the lowest available energy level first