Question

The elements A, B, C, D, E and F have atomic numbers 19, 16, 10, 12, 17 and 11 respectively. Answer the following: a) Identify the strongest non-metal. b) Name the alkaline earth metal. c) Name the elements which have the same valency. d) Identify the elements that have the same number of valence electrons. e) State the formula of the compound formed between the elements B and F.​

Answer 1

Answer:

Correct option is C)

Let us take a look at the electronic configurations of the given elements,

A: (2, 7)

B: (2, 8, 1)

C: (2, 8, 7)

D: (2, 8, 2)

E: (2, 8, 3)

We can see that elements A and C both have 7 valence electrons. Thus, both the elements belong to the same group.

So, the correct option is C

Explanation:

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