Fall Semester Test

Front

What is 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 in the molecule.

Front

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

Back

The number of valence electrons can be determined by looking at the group number of the element in the periodic table.

Front

What is the significance of valence electrons in chemical bonding?

Back

Valence electrons are important because they are involved in forming bonds between atoms, determining the chemical properties of the element.

Front

What does each line in a Lewis structure represent?

Back

Each line in a Lewis structure represents a pair of shared electrons.

Front

How many valence electrons does Tin (Sn) have?

Back

Tin (Sn) has 4 valence electrons.

Front

What is the correct Lewis structure for PBr3?

Back

The correct Lewis structure for PBr3 is structure D.

Front

What is the correct Lewis structure for hydrogen cyanide (HCN)?

Back

The correct Lewis structure for hydrogen cyanide (HCN) shows a triple bond between carbon and nitrogen, with hydrogen bonded to carbon.

Front

What is the identity of an atom with 3 valence electrons?

Back

The identity of an atom with 3 valence electrons is aluminum.

Front

What is the maximum number of electrons that can occupy a single orbital?

Back

The maximum number of electrons that can occupy a single orbital is 2.

Front

What is the octet rule?

Back

The octet rule states that atoms tend to bond in such a way that they have eight electrons in their valence shell, achieving a stable electron configuration.