4. In a polar covalent bond, the bonded atoms.(1 Point)
Share the electrons equally
Share the electrons unequally.
One atom loses and the other gains.
Both atoms gain electrons

5. In a molecule of bromine Br2

the difference in electronegativity is zero and the bond is polar covalent

the difference in electronegativity is zero and the bond is ionic.

the difference in electronegativity is zero and the bond is nonpolar covalent.

Not enough information to tell.

6. As the difference in electronegativity increases the bond Tends to be


more ionic

less ionic

more covalent

not related
7. a covalent bond takes place between which of the following ?


Metal and a metal

Nonmetal and metal

Nonmetal and nonmetal

All elements of the periodic table
8. When the two atoms share a pair of electrons (one electron each) they have


Double bond

Triple bond

single bond

not enough information to tell
9. atoms try to have a configuration similar to that of a noble gas. This rule is called


. hund's rule

Aufbau principle

Rule of triple

Octet rule
10.1. Which is correct about element A whose electron configuration is 1S2/ 2S2 2P4 ?

Has 4 valence electrons and needs 2 to fulfil the octet rule.

Has 4 valence electrons and needs 4 to fulfil the octet rule.

Has 6 valence electrons and needs 2 to fulfil the octet rule.

Has 6 valence electrons and needs 6 to fulfil the octet rule