Question

5. An element‘x'belongs to groups 2. Find its valency.
6. An elements ‘y’belongs to group 1. Find formula for its​

Answer 1

Answer:

5. it's valency = 2

6. it's formula is EKA li

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Answer 2

5. An element‘x'belongs to groups 2. Find its valency.

6. An elements ‘y’belongs to group 1. Find formula for its​

Explanation:

5- The group number of  an element is equal to the number of its valence electrons. Therefore, the number of valence electrons of 'x' is 2 which is also its valency.

6- We know that the element 'y' belongs to group 1 making its valency = 1

Therefore,

The formula for its oxide would be y₂O

The formula for its chloride would be yCl