Chem Ch.7/8 Finals Review

When atoms gain electrons, the ion has a ...

• positive charge (cation)

• positive charge (anion)

• negative charge (cation)

• negative charge (anion)

Nonmetals tend to form...

• cations

• anions

• nonmetals do not form ions

How many electrons are normally present in the outer shell of an atom with a noble gas configuration?

• 2

• 6

• 8

• 10

Molecular compounds are represented by a chemical formula known as ...

• a molecular formula

• a formula unit

• a structural formula

• an ionic formula

Metallic substances are best described as

• anions in a sea of mobile valence electrons

• cations in a sea of mobile valence electrons

• covalently bonded groups of aoms

• covalently bonded groups of atoms with a charge

A molecule is drawn containing a triple bond. How many electrons are shared?

• 2

• 4

• 6

• 7

Which of the following is an exception to the octet rule? (you may want to draw these)

• HCl

• SCl2

• BrCl

• BeCl2

What is the shape of the molecule H2S?

• trigonal planar

• linear

• bent

• pyramidal

What is the shape of the molecule H2O?

• trigonal planar

• linear

• bent

• pyramidal

A molecule contains a bond between a carbon atom and a chlorine atom. Carbon has an electronegativity of 2.5 and chlorine has and electronegativity of 3.0. What type of bond is formed?

• polar

• nonpolar

• ionic

• metalic