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fadhilah
7 cards·by fadhilah
H
Hydrogen, Group 1, Period 1
Li
Lithium, Group 1, Period 2
Na
Sodium, Group 1, Period 3
K
Potassium, Group 1, Period 4
Rb
Rubidium, Group 1, Period 5
Cs
Caesium, Group 1, Period 6
Fr
Francium, Group 1, Period 7