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:

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Answer 2

1.The valency of magnesium is equal to plus 2.

Explanation:

• 2.The  molecule of iodine forms a diatomic substance and exist in solid state at room temperature. However it is capable of of sublimation.

• 3. the element in group 17 which belongs to the same period as that of sodium is chlorine.

• 4. The formula of the compound formed between lithium and bromine is LiBr.

• 5.The formula of the compound formed between calcium and fluorine is CaF2.

To know more about elements and compounds,

Give 4-5 difference between Elements and Compounds - Brainly.in

https://brainly.in/question/6007033