1

D) salt

A compound held together by ionic bonds is called a __ A)diatomic molecule B) polar compundC)covalent moleculeD) salt

It gains electrons

How does oxygen obey the octet rule when reacting to form compounds?

the same as that of a neon atom

The electron config. of a fluoride ion, F-

A) the electron config. of a noble gas

The octet rule states that, in chemical compounds, atoms tend to have___ A) electron config. of a noble gas B) more protons than electrons C) 8 electrons in their principal energy level D) more electrons than protons

B) it gives up electrons

How does calcium obey the octet rule when reacting to form compounds? A)It gains electrons B) It gives up electrons C)It doesn't change its # of electrons D)Calcium doesn't obey the octet rule

B) 2

How many electrons does barium have to give up to achieve a noble-gas electron config.? A) 1 B) 2 C) 3 D) 4

C) 3

How many electrons does nitrogen gain in order to achieve noblegas electron config? A) 1 B) 2 C) 3 D) 4

B) 4

How many valence electrons are in a silicon atom? A) 2 B) 4 C) 6 D) 8

A) 2

How many valence electrons are in an atom of magnesium? A) 2 B) 3 C) 4 D) 5

D) 5

How many valence electrons are in an atom of phosphorus? A) 2 B) 3 C) 4 D) 5

C) 2

How many valence electrons are transferred from the calcium atom to iodine in the formation of the compound calcium iodide? A) 0 B) 1 C) 2 D) 3

A) 0

How many valence electrons are transferred from the nitrogen atom to potassium in the formation of the compound potassium nitride? A) 0 B)1 C) 2 D) 3

A) 2

How many valence electrons does a helium atom have? A)2 B) 3 C) 4 D) 5

1+

What is the charge on the cation in the ionic compound sodium sulfide?

2+

What is the charge on the strontium ion?

1s2 2s2 2p6

What is the electron config of oxide (O2-)

1s2 2s2 2p6 3s2 3p6

What is the electron configuration of the calcium ion?

P3-

What is the formula of the ion formed when phosphorus achieves a noblegas electron config A) P3+ B) P2+ C) P2- D) P3-

B) K+

What is the formula of the ion formed when potassium achieves noble-gas electron config.? A) K2+ B) K+ C) K1- D) K2-

AL2 O3

What is the formula unit aluminum oxide?

NA3 N

What is the formula unit of sodium nitride

B) valence electrons

What is the name of the electrons in the highest occupied energy level of an atom? A) orbital electrons B) valence electrons C) anions D) cations

0

What is the net charge of the ionic compound calcium fluoride?

A) fluorine

Which of the following elements does NOT form an ion with a charge of 1+? A) flourine B) hyrdrogen C) potassium D) sodium

D) all the above

Which of the following is true about an ionic compound? A) it's a salt B) it's held together by ionic bonds C) it's composed of anions and cations D) all of the above

A) oppositely charged ions attract

Which of the following occurs in an ionic bond? A) oppositely charged ions attract B) 2 atoms share 2 electrons C) 2 atoms share more than 2 electrons D) like charged ions attract