Lewis structures

Front

What is the octet rule?

Back

The octet rule states that most elements need 8 valence electrons to achieve a stable electron configuration.

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in forming bonds.

Front

How many valence electrons does oxygen have?

Back

Oxygen has 6 valence electrons.

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.

Front

What is the correct Lewis structure for CH₂O?

Back

The correct Lewis structure for CH₂O has carbon in the center, bonded to two hydrogens and one oxygen, with a double bond to oxygen.

Front

What type of bond is formed between two nonmetals?

Back

A covalent bond is formed between two nonmetals, where they share electrons.

Front

What are lone pairs in a Lewis structure?

Back

Lone pairs are pairs of valence electrons that are not involved in bonding and are located on an atom.

Front

What is the significance of the dots in a Lewis dot diagram?

Back

The dots represent valence electrons in a Lewis dot diagram.

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 all the atoms in the molecule.

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.