Question

3
The table shows the electronic structures of four elements.
Element
Electronic Structure are as follows P 2,1
Q 2,8,6
R 2,8,7
S 2,8,8
a. Identify which element(s) will form covalent bonds with carbon.
b. "Carbon reacts with an element in the above table to form several compounds give suitable reason

Answer 1

a. Covalent Bonds are bonds formed by sharing electrons between 2 atoms.

As per the electronic configurations of the given elements, we can Identify them as:

P- Oxygen (0)

• Q- Sodium (Na)

• R- Chlorine (CI)

• S- Argon (Ar)

Now,

• We know that Sodium (Q) is an

Alkali Metal that donates one

electron to form ionic compounds. Hence, it does not form covalent bonds with Carbon.

• Argon (S) is a noble gas. Noble gases are inert elements that form neither ionic nor covalent bonds.

• Oxygen (P) and Chlorine (R) accept electrons to form ionic as well as covalent bonds. Oxygen bonds with Carbon to form CO 2, while Chlorine forms CCI 4.

So, the correct answer is P and R

b . The element which is referred to here

is 'P'

which is actually Oxygen (0)

Carbon reacts with Oxygen to form different compounds like

Carbon Monoxide

• Carbon dioxide

• Carbon suboxide

Different Compounds are possible due to 2 properties of Carbon

Tetravalancy - It means Carbon has valancy of 4 (It is tetravalent)

• Catenation - It is the property of Carbon to self combine and form.