Question

(vi) The elements A, B, C, D and E have atomic number 4, 10, 12, 13, 17 respectively.
Which of the elements belong to the same period?
(a) A,B,C
(b) B,C,D
(c) CD,E (d) A,C,D
the formula and nature of​

Answer 1

Answer:

The respected person only elements with Atomic number 12(Magnesium), 13(Aluminium) and 17(Chlorine) come in same period so the answer wil l be option "C".

Explanation:

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