Honors Chem Unit 7 - Midterm Exam Review - 24-25

Front

True or False: Atoms become less stable when they combine.

Back

False: Atoms generally become more stable when they combine to form molecules.

Front

How many electrons are shared in a single bond?

Back

2: A single bond involves the sharing of two electrons between two atoms.

Front

How many electrons are shared in a triple bond?

Back

6: A triple bond involves the sharing of six electrons between two atoms.

Front

In the Lewis Structure for CO₃²⁻, how many lone pairs (single electrons) are added to the whole structure?

Back

16: The Lewis structure for CO₃²⁻ has a total of 16 lone pairs.

Front

In the Lewis Structure for CO₃²⁻, how many double bonds are there?

Back

1: There is one double bond in the Lewis structure for CO₃²⁻.

Front

What is a covalent bond?

Back

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

Front

Define a Lewis Structure.

Back

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

Front

What is the octet rule?

Back

The octet rule states that atoms tend to form bonds until they are surrounded by eight valence electrons.

Front

What is the difference between a single bond and a double bond?

Back

A single bond involves one pair of shared electrons, while a double bond involves two pairs of shared electrons.

Front

What is a lone pair of electrons?

Back

A lone pair of electrons is a pair of valence electrons that are not shared with another atom.