Question

Q1. A scientist was studying reactions of metals and non-metals. He knew group 1 and 2

elements are metals while group 1 and 2 elements are metals while group 17 elements

are non-metals. So, he chooses different elements from group 1, group 2 and group 17.

(i) What is the valency of magnesium?

(ii) Name the element in group 17 which forms a diatomic molecule and exists in solid state

at room temperature.

(iii) Name the element in group 17 which belongs to the same period as sodium.

(iv) Write the formula of compound formed in the reaction between lithium and bromine.

(v) Write the formula of compound formed in the reaction between calcium and fluorine.​

Answer 1

Answer:

i) THE VALENCY OF MAGNESIUM IS 2

ii) the element in group 17 which forms a diatomic molecule and exists in solid state IS CHLORINE

iii)the element in group 17 which belongs to the same period as sodium IS ALSO CHLORINE.

iv) the formula of compound formed in the reaction between lithium and bromine IS LiBr.

v)the formula of compound formed in the reaction between lithium and bromine IS CaF₂.

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