Question

which element listed is the least electronegative?
boron
chlorine
nitrogen
fluorine
oxygen
question 20
1 pts
in a covalent bond, electrons are shared such that each atom of the bonded pair has __________ valence electrons associated with it (or two in the case of hydrogen).
7
6
8
5
4

Explanation:

Electronegativity increases across a period and decreases down a group in the periodic table. Boron is the least electronegative among the given elements as it is further left on the periodic table compared to the others. In a covalent bond, atoms share electrons to achieve a stable electron - configuration. For most atoms (except hydrogen), this stable state is achieved when they have 8 valence electrons, known as the octet rule.

Answer:

1. A. boron
2. C. 8