H

#1

1 proton, 0 neutrons, 1 electron

atomic mass= 1

charge= +1

He

#2

2 protons, 2 neutrons, 2 electrons

atomic mass = 4

Li

#3

3 protons, 3 neutrons, 3 electrons

atomic mass = 6

charge= +1

Be

#4 

4 protons, 5 neutrons, 4 electrons

atomic mass= 9

charge= +2

B

#5

5 protons, 5 neutrons, 5 electrons

atomic mass= 10

C

#6

6 protons, 6 neeutron, 6 electrons

atomic mass= 12

N

#7

7 protons, 7 neutrons, 7 electrons

atomic mass= 14 

O

#8

8 protons, 8 neutrons, 8 electrons

atomic mass= 16

charge= -2

F

#9

9 protons, 10 neutrons, 9 electrons

atomic number= 19

charge= -1

Ne

#10

10 protons, 10 neutrons, 10 electrons

atomic mass= 20

Na

#11

11 protons, 11 neutrons, 11 electrons

atomic mass= 22

charge= +1

Mg

#12

12 protons, 12 neutrons, 12 electrons

atomic mass= 24

charge= +2

Al

#13

13 protons, 13 neutrons, 13 electrons

atomic mass= 26

charge= +3

Si

#14

14 protons, 14 neutrons, 14 electrons

atomic mass= 28

P

#15

15 protons, 15 neutrons, 15 electrons

atomic mass= 30

S

#16

16 protons, 16 neutrons, 16 electrons

atomic mass= 32

Cl

#17

17 protons, 18 neutrons, 17 electrons

atomic mass= 35

charge= -1

Ar

#18

18 protons, 21 neutrons, 18 eletrons

atomic mass= 39

K

#19

19 protons, 20 neutrons, 19 electrons

atomic mass= 39

charge= +1

Ca

#20 

20 protons, 20 neutrons, 20 electrons

atomic mass= 40

charge =+2