Ch. 8 Test Review: Covalent compounds and calculating molar gas

Front

What is a lone pair?

Back

A pair of non-bonding electrons.

Front

According to the octet rule, how many valence electrons do most elements need?

Back

8

Front

What type of compound is Al2S3?

Back

Ionic.

Front

Which option represents an acceptable Lewis structure for CH3Cl?

Back

Option A.

Front

How many lone pairs does NH3 have?

Back

1.

Front

Define covalent bond.

Back

A chemical bond formed by the sharing of electron pairs between atoms.

Front

What is the octet rule?

Back

The principle that atoms tend to bond in such a way that they have eight electrons in their valence shell.

Front

What is the difference between ionic and covalent compounds?

Back

Ionic compounds are formed by the transfer of electrons, while covalent compounds are formed by the sharing of electrons.

Front

What is a Lewis dot structure?

Back

A diagram that shows the bonding between atoms of a molecule and the lone pairs of electrons that may exist.

Front

How do you determine the number of valence electrons in an element?

Back

By looking at its group number in the periodic table.