Question 1

sum of protons and neutrons

Accepted Answer

atomic mass

Question 2

the number of protons in the nucleus of an atom

Accepted Answer

atomic number

Question 3

Atoms of the same element that have different numbers of neutrons

Accepted Answer

isotope

Question 4

A change in the number of electrons (now charged)

Accepted Answer

ion

Question 5

change in the number of protons

Accepted Answer

different element

Question 6

subatomic particle that has a negative charge

Accepted Answer

electron

Question 7

subatomic particle that has no charge

Accepted Answer

neutron

Question 8

subatomic particle that has a positive charge

Accepted Answer

proton

Question 9

location of electrons

Accepted Answer

electron cloud

Question 10

must be in equal numbers for a neutral atom

Accepted Answer

protons and electrons

Question 11

smallest particle of an element that keeps its identity in a chemical compound

Accepted Answer

atom

Question 12

they are found in the nucleus of an atom

Accepted Answer

protons and neutrons

Question 13

A chart of the elements showing the repeating pattern of their properties

Accepted Answer

periodic table

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