Atomic
Mass
Period
Group/
Family
Element
Name
Fill in the chemical symbol.
Hydrogen CH )
(metal
(Wait until
(rounded)
1
Helium HE
4
18
No
Caloumi
Argon (AC)
Potassium LK
Chlorine TL
Oxygen 20
Magnesium 19.
Scandium 60
Nitrogen
Carbon​