Question

The following:
5. Symbol of the element
A) Al
B) Na
C) Be
D) C
E) N
A B C D E
a) 4 1 2 5 3
c) 4 5 1 3 2
Group number
1) IA
2) IVA
3) VA
4) IIIA
5) IIA
A B C C D
D E
b) 4 1 5 2 3
4 1 5 3 2
an
TEN​

Answer 1

Answer:

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