Chemistry 2nd Semester Final Review

The electrostatic force binding oppositely charged ions together

• metallic bond

• covalent bond

• formula unit

• ionic bond

Answer explanation

Remember ionic bond holds ions.

Compound that contains cations and anions

• molecular compound

• metallic compound

• ionic compound

• alloy

Answer explanation

Cation and anion are ions, which form ionic compounds.

An electron in the highest occupied energy level of an atom

• halide electron

• valence electron

• inner electron

• high energy electron

States the atoms in most compounds achieve the electron configuration of a noble gas

• formula unit

• chemical compound

• electron dot structure

• octet rule

Answer explanation

Most atoms want 8 valence electrons. Helium and hydrogen are okay with 2 valence electrons.

How many valence electrons does an atom of any element in Group 6A have?

• 2

• 4

• 6

• 8

Answer explanation

Remember valence electrons = group number EXCEPT helium.

The electron dot structure for phosphorus should have how many dots?

• 3

• 5

• 2

• 7

Answer explanation

Should have 5 since phosphorus (P) is in group 5A.

How many valence electrons does Helium have?

• 1

• 2

• 6

• 8

Answer explanation

While helium is found in group 8A, it is an exception. It only has 2 valence electrons.

When an aluminum atom loses valence electrons, what is the charge on the resulting ion?

• 2+

• 2-

• 3+

• 3-

Answer explanation

Since aluminum (Al) is in group 3A, it is easier for it to lose 3 electrons than gain 5 electrons to get to 8.

In forming chemical bonds, atoms tend to attain an element that

• is in a state of higher energy

• has the electron configuration of noble gases

• has the electron configuration halogens

• all of the following

Answer explanation

This is the definition of the octet rule.

An ionic compound is

• electrically neutral

• held together by ionic bonds

• composed of anions and cation

• all of the following