Mastery Check 8.2

Front

What is the Lewis structure for water (H2O)?

Back

The Lewis structure for water shows two hydrogen atoms bonded to one oxygen atom, with two lone pairs of electrons on the oxygen.

Front

How many electrons are in the Lewis dot model for Helium?

Back

Helium should have 2 electrons around its Lewis dot model.

Front

What type of bond is formed when three pairs of electrons are shared between two atoms?

Back

A triple bond is formed when three pairs of electrons are shared.

Front

What is the Lewis structure for CH2O?

Back

The Lewis structure for CH2O shows a carbon atom double bonded to an oxygen atom and single bonded to two hydrogen atoms.

Front

What is the correct Lewis dot structure for the molecule fluorine (F2)?

Back

The correct Lewis dot structure for F2 shows two fluorine atoms, each with three lone pairs and one bond between them.

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 significance of lone pairs in Lewis structures?

Back

Lone pairs represent non-bonding electrons that can affect the shape and reactivity of a molecule.

Front

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

Back

The number of valence electrons is determined by the group number of the element in the periodic table.

Front

What is the octet rule in chemistry?

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.

Front

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

Back

A single bond involves one pair of shared electrons, a double bond involves two pairs, and a triple bond involves three pairs of shared electrons.