Lewis structures

Front

What is the octet rule?

Back

The octet rule states that atoms tend to gain, lose, or share electrons in order to have eight electrons in their valence shell, achieving a stable electron configuration.

Front

How many electrons does hydrogen need to be stable?

Back

Hydrogen needs 2 electrons in its outer energy level to be stable.

Front

What is a covalent bond?

Back

A covalent bond is a chemical bond that involves the sharing of electron pairs between non-metal atoms.

Front

What is the Lewis structure for NH3?

Back

The Lewis structure for NH3 (ammonia) shows a nitrogen atom bonded to three hydrogen atoms, with one lone pair of electrons on the nitrogen.

Front

What is the correct Lewis dot structure for F2?

Back

The correct Lewis dot structure for F2 (fluorine gas) shows two fluorine atoms sharing a pair of electrons, represented by a single line between them.

Front

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

Back

Most elements need 8 valence electrons according to the octet rule.

Front

What are lone pairs in a Lewis structure?

Back

Lone pairs are pairs of valence electrons that are not shared with another atom and are found on the same atom.

Front

What is the significance 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.

Front

How do you determine the total number of valence electrons in a molecule?

Back

To determine the total number of valence electrons in a molecule, add the valence electrons of each atom in the molecule.

Front

What is the difference between a single bond and a double bond in Lewis structures?

Back

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