Ion formation and ionic bonds

Which of these is the electron configuration of an atom most likely to lose and electron?

• 1s2 2s2 2p6

• [He]2s2 2p5

• 1s2 2s2 2p6 3s2 3p5

• 1s2 2s2 2p6 3s2 3p6 4s1

A positive ion forms when ________.

• an atom loses one or more valence electrons

• an atom gains one or more valence electrons

• electrons are pulled into the nucleus

• electrons are pushed out of the nucleus

Why is the calcium ion (Ca2+) more stable than the calcium atom (Ca)?

• Twenty electrons are more stable than eighteen electrons.

• Eighteen electrons are less stable than twenty electrons.

• The two electrons more than the noble gas configuration is more stable.

• The noble gas configuration is more stable.

What is the electron configuration of the sodium atom after it loses an electron?

• 1s2 2s2 2p6

• [He]2s2 2p5

• 1s2 2s2 2p6 3s1

• 1s2 2s2 2p6 3s2

Explain why the zinc 2+ ion has some stability.

• The zinc ion has achieved a noble gas configuration.

• The zinc ion has full s, p, and d sublevels to form a pseudo-noble gas configuration.

• The zinc ion is a transition metal.

• The zinc ion has bonded with two free electrons.

Which of the following lattice energies represents the strongest force of attraction holding the ions in place?

• 632 kJ/mol

• 769 kJ/mol

• 910 kJ/mol

• 2142 kJ/mol

An ionic compound that will conduct an electric current when it forms an aqueous solution is a(n) _______.

• electrolyte

• nonelectrolyte

• molecular compound

• crystal lattice

Ionic crystals have high melting points and high boiling points because _______.

• ionic bonds are relatively weak

• ionic solids are excellent conductors of electricity

• ionic bonds are relatively strong

• ionic liquids do not conduct electricity

In the ionic solid sodium chloride (NaCl), there is a ________ ratio of sodium ions to chlorine ions.

• one to two

• two to one

• one to one

• one and a half to one

What is the ionic ratio of aluminum to oxygen in the ionic compound aluminum oxide?

• one to three

• one to two

• two to three

• one to three