Chemical Bonding and Electron Configuration

Based on the octet rule, phosphorus most likely forms a ____ ion.

• P3-

• P3+

• P5+

• P+

The halogens, alkali metals, and alkaline earth metals have ____ valence electrons, respectively.

• 7, 4, and 6

• 1, 5, and 7

• 8, 2, and 3

• 7, 1, and 2

• 2, 7, and 4

Which of the following would have to gain two electrons in order to achieve a noble gas electron configuration?

• Br

• Sr

• Na

• O, Se

• Sr, O, Se

The electron configuration of the S2- ion is ____.

• [Ar]3s23p6

• [Ar]3s23p2

• [Ne]3s23p2

• [Ne]3s23p6

Elements from opposite sides of the periodic table tend to form ____.

• covalent compounds

• ionic compounds

• compounds that are gaseous at room temperature

• homonuclear diatomic compounds

• covalent compounds that are gaseous at room temperature

A triple bond consists of ____ pairs of electrons shared between two atoms.

• 1

• 2

• 3

• 4

• 6

Given the electronegativities below, which covalent single bond is most polar? Element: H C N O Electronegativity: 2.1 2.5 3.0 3.5

• C—H

• N—H

• O—H

• O—C

• O—N

How many single covalent bonds must a chlorine atom form to have a complete octet in its valence shell?

• 0

• 1

• 2

• 3

• 4

In the Lewis symbol for a nitrogen atom, there are ____ paired and ____ unpaired electrons.

• two, three

• one, three

• three, two

• zero, five

• two, two

The electron configuration of the S²⁻ ion is ____.

• [Ne]3s²3p²

• [Kr]3s²2p⁶

• [Ar]3s²3p⁶

• [Ne]3s²3p⁶

• [Ar]3s²3p²