Question

its a two part wuestion. plz look at second pic

The Lewis representation above depicts a reaction between a halogen (blue) and a main-group element from group _ (red). In this representation, each Y atom needs electron(s) to complete its octet, and gains these electrons by forming bond(s) with atoms of X. There are molecule. unshared electron pair(s) and bonding electron pair(s) in the product The bonds in the product are Submit Answer Retry Entire Group 9 more group attempts remaining

Answer 1

As mentioned I am focusing on 2nd pic

2H + Y ------> H2Y

A) Since, Y has 6 valence electrons hence Y belongs to group 16.

B) Y already have 6 valence electrons and hence only 2 electrons are needed for Y to complete 8 electrons (octate).

Therefore, Y forms 2 sigma bonds (single bonds) with H atoms to complete its octate.

C) Unshared electrons of Y = 4 i.e. 2 electron pairs

Shared electrons of Y = 2 , i.e. 1 electron pair

Shared electrons of 2 H atoms = 2 (1 + 1) = 1 electron pair

i.e. 1 electron of individual H atom

Total shared electrons in product = 2 + 2 = 4 i.e. 2 electron pairs.

D) Since, bonds are formed by electron sharing and hence bonds are covalent bond in product.

Let me know in case of any doubts.