Chapter 7 Assessment 7.1 Ions

How many electrons must an atom of each element lose to attain a noble gas electron configuration?

A. Ca 2 B. Al 3 C. Li 1 D. Ba 2

Write electron dot structures for each of the following elements.

A. Cl (7) B. S (6) C. Al (3) D. Li (1)

How many electrons must be gained by each of the following atoms to achieve a stable electron configuration?

A. N 3 B. S 2 C. Cl 1 D. P 3

To which group in the periodic table does each of the following elements belong? How many valence electrons do atoms of each element have?

A. Nitrogen Group 5A; 5 valence electrons B. Lithium Group 1A; 1 valence electrons C. Phosphorous Group 5A; 1 valence electrons D. Barium Group 2A; 2 valence electrons E. Bromine Group 7A; 7 valence electrons F. Carbon Group 4A; 4 valence electrons

What is the formula of the ions formed when atoms of the following elements gain or lose valence electrons and attain noble-gas configuration?

A. Sulfur S^2- B. Sodium Na^+ C. Fluorine F^- D. Phosphorous P^3-

What is a valence electron?

An electron in the highest occupied level

Describe two ways that an ion forms from an atom.

Gaining electrons or losing electrons

Why do nonmetal atoms tend to form anions when they react to form compounds?

Most nonmetals gain 1,2,or 3 electrons to achieve noble gas electron configuration.

Define an Ionic Bond

The electrostatic force that holds ions together in ionic compounds.