Chemistry Unit 4 Practice Test

Front

What is the charge of a beryllium ion?

Back

+2

Front

What does the orbital diagram represent for oxygen?

Back

O

Front

Is this a correct dot diagram for nitrogen (N)?

Back

true

Front

What is the definition of an ion?

Back

An ion is an atom or molecule that has a net electrical charge due to the loss or gain of one or more electrons.

Front

What is the octet rule in chemistry?

Back

The octet rule states that atoms tend to gain, lose, or share electrons to achieve a full set of eight valence electrons.

Front

What is the difference between a covalent bond and an ionic bond?

Back

A covalent bond involves the sharing of electron pairs between atoms, while an ionic bond involves the transfer of electrons from one atom to another.

Front

What is the significance of the periodic table in chemistry?

Back

The periodic table organizes elements based on their atomic number, electron configuration, and recurring chemical properties.

Front

What is a Lewis dot structure?

Back

A Lewis dot 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 definition of electronegativity?

Back

Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons.

Front

What is the role of valence electrons in chemical bonding?

Back

Valence electrons are the outermost electrons of an atom and are involved in forming bonds with other atoms.