periodicity

Question 1

what is a molecule

Answer 1

two or more atoms bonded together

Question 2

what is the mass of a proton

Answer 2

1

Question 3

what is the mass of a neutron

Answer 3

1

Question 4

what is the mass of a electron

Answer 4

1/2000

Question 5

what is the charge of a neutron

Answer 5

0

Question 6

what is the charge of a proton

Answer 6

+1

Question 7

what is the charge of an electron

Answer 7

-1

Question 8

what is an atomic number

Answer 8

number of protons

Question 9

what is a mass number

Answer 9

protons + neutrons

Question 10

definition of an isotope

Answer 10

atoms of an element with the same number of protons but a different number of neutrons

Question 11

definition of relative atomic mass

Answer 11

the ratio of the average mass of an element when compared with one atom of carbon-12

Question 12

what are group numbers on the periodic table

Answer 12

numbers that run along the top

Question 13

what does the group number show

Answer 13

how many electrons there are in its outer shell

Question 14

what are the period numbers on the periodic table

Answer 14

the numbers that run down the side

Question 15

what do the period numbers show

Answer 15

number of shells of electrons