Refer to the periodic table and predict the number of valence electrons for an atom of each

Question:

Refer to the periodic table and predict the number of valence electrons for an atom of each of the following representative elements:

(a) Na 

(b) Al 

(c) S 

(d) Xe.

Periodic Table:

2 3 4 5 N.. 3 7 Li 6.94 11 1 IA Na 22.99 19 37 G 85.47 4 2 IIA Be 9.01 38 Rb Sr 87 12 K Ca Sc 39.10 40.08

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