15-20 Flashcards
1
Q
Sulfur
A
16
S
32
Non-metal
2
Q
Chlorine
A
17
Cl
35
Halogen
3
Q
Argon
A
18
Ar
39. 48
Noble gas
4
Q
Pottasium
A
19
K
39.09
Alkali
5
Q
Calcium
A
20
Ca
40
Alkaline earth metals