Question

(c) Which one of the following has the highest
electronegativity ?
Be, B, Li, C​

Answer 1

Carbon has the highest electronegativity as it increases on moving left to right.

Answer 2

Answer:

C (carbon) has the highest electronegativity than Be, B, and  Li.

Explanation:

Electronegativity:- it is defined as a function of an atom’s ability to attract a shared pair of electrons toward itself.

Factors affecting electronegativity:-

• The size of an atom is the main reason that affects this tendency

• The other one is the nuclear charge

• And the last one that affects electronegativity is the Effect of substituent

Electronegativity is basically measured by the Linus Pauling scale,

Here, if you go through the period in the periodic table from left to right the decrease of the atomic size takes place which leads to an increase in electronegativity from one side to the other in the period in the modern periodic table.

If you go through the group in the modern periodic table from top to bottom the size of atoms increases which results in to decrease in electronegativity

So, the electronegativity of elements is as follows:-

• Be $1.5$

• B $2.0$

• Li $0.98$

• C $2.55$

Therefore, C (carbon) has the highest electronegativity.