Question

Analyse the data given below and choose the pair of elements that will form an ionic bond.

Element	Atomic Number
P	9
Q	10
R	11
S	12

• A. P and R
• B. R and S
• C. Q and R
• D. P and Q

Answer 1

The correct option is A P and R

• Here, P has 7 electrons in its valence shell, and can receive 1 electron in order to complete the octet and to form a stable compound.
• Element Q is having 8 electrons in the valence shell, therefore it is stable and will not form any chemical bond
• Element R has 1 electron in its valence shell, and has a tendency to lose electrons to form a cation and become stable. So R can form an ionic bond with P.
• Element S has 2 electrons in its valence shell so it is easier for S to lose 2 electrons and forms a cation, so S can form an ionic bond with P.