Chemistry: (atomic structure)

Question 1

which number (below or above) is the mass/atomic number

Answer 1

above= mass number
below= atomic number

Question 2

mass number - atomic number gives you what ?

Answer 2

the number of neutrons

Question 3

PROTONS AND ELECTRONS ARE THE SAME AMOUNT !!!!

Answer 3

KNOW THIS.

Question 4

Whats an isotope

Answer 4

atoms of an element with the same amount of protons but different amount of neutrons

Question 5

what are ions

Answer 5

ions are atoms that have an overall charge. they’ve gained or lost electrons

Question 6

what is the radius of an atom ?

Answer 6

1 x 10(-10) m

Question 7

describe the atomic structure

Answer 7

has a nucleus that contains protons and neutrons. the charge of the nucleus is positive

the nucleus is surrounded by electrons which have a negative charge.

energy level is higher the further away from the nucleus it is

Question 8

whats a compound

Answer 8

two or more elements chemically combined

Question 9

whats a mixture

Answer 9

two or more elements not chemically joined and can be separated easily

Question 10

whats a halogen and list 3

Answer 10

A halogen is a chemical element that forms a salt when it reacts with metal.

fluorine, chlorine, bromine, iodine, and astatine.