Name the Element
Name the Symbol
Number of Protons
Number of Electrons
Number of Neutrons
100

He

Helium

100

Oxygen

O

100

Number of Protons in Argon

18

100

Number of electrons in Mo

42

100

Number of neutrons in Sc

24

200

Fe

Iron

200

Silver

Ag

200

Number of protons in Ca2+

20

200

Number of electrons in Fr

87

200

Number of neutrons in H

0

300

Si

Silicon

300

Manganese

Mn

300

Number of protons in Cl-

17

300

Number of electrons in Ni2+

26

300

Number of neutrons in P-32

17

400

Co

Cobalt

400

Rubidium

Rb

400

Number of protons in Barium

56

400

Number of electrons in S2-

18

400

Number of neutrons in 66Zn2+

36

500

Pt

Platinum

500

Tungsten

W

500

Number of protons in Ga-71

31

500

Number of valence electrons in K+

8

500

Number of neutrons in 238U

146