Question

a)Write the electronic configuration and valencies of the following elements
i) Chlorine
ii) Neon
iii) Magnesium​

Answer 1

Answer:

ii

Explanation:

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Answer 2

Explanation:

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>>Write the electronic configuration and valencies of the following elements

i) Chlorine

ii) Neon

iii) Magnesium

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A) The atomic number of chlorine is 17 (Z=17).

>>Valency = 1

>>The electronic configuration of chlorine can be written as 2, 8, 7. 2, 8, 7 electrons are distributed in the shells K, L, M respectively.

B) Neon is a p-block element and belongs to noble gas or inert gas group.

>>Neon (Ne)[He] 2s2 2p6

>>Valency = 0

C)>> The electronic configuration of magnesium is 2,8,2.

>>The valence shell contains 2 electrons.

>>Therefore the valency is two.