Chemistry Practice Test: Bonding

Based on the octet rule, magnesium most likely forms a __________ ion.

• Mg^-

• Mg⁶⁺

• Mg²⁺

• Mg^6-

• Mg^2-

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

• P^5-

• P⁵⁺

• P⁺

• P^3-

• P³⁺

Which ion below has a noble gas electron configuration?

• B2+

• Be2+

• C2+

• N2-

• Li2+

The electron configuration of the phosphide ion (P^3-) is __________.

• [Ne]3s2 3p3

• [Ne]3s2 3p1

• [Ne]3s2

• [Ne]3p2

• [Ne]3s2 3p6

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

• 8, 2, and 3

• 7, 1, and 2

• 2, 7, and 4

• 2, 4, and 6

• 1, 5, and 7

Lattice energy is __________.

• the sum of electron affinities of the components in an ionic solid

• a measure of the strength of the ionic bond

• the sum of ionization energies of the components in an ionic solid

• the energy given off when gaseous ions combine to form one mole of an ionic solid

• the energy required to produce one mole of an ionic compound from its constituent elements in their standard states

In which of the molecules below is the carbon-carbon distance the shortest?

• H₃C-CH₃

• H₂C=CH₂

• H₂C = C = CH₂

• H₃C-CH₂-CH₃

• HC =CH

Of the atoms below, __________ is the most electronegative.

• Ca

• Rb

• S

• Cl

• Si

Electronegativity __________ from left to right within a period and __________ from top to bottom within a group.

• increases, increases

• increases, decreases

• decreases, increases

• stays the same, increases

• increases, stays the same

The Lewis structure of AsH₃ shows __________ nonbonding electron pair(s) on As.

• 0

• 1

• 2

• 3

• This cannot be determined from the data given.