Lewis structures

Front

What is a covalent bond?

Back

A bond that shares electrons between non-metals.

Front

How many valence electrons does phosphorus have?

Back

5

Front

How many total valence electrons are participating in bonding in a molecule with 4 atoms?

Back

8

Front

What is the Lewis structure for NH3?

Back

The Lewis structure shows nitrogen in the center with three hydrogen atoms bonded to it and one lone pair of electrons.

Front

What is the Lewis structure for CH2O?

Back

The Lewis structure shows carbon in the center bonded to two hydrogen atoms and one oxygen atom, with oxygen having two lone pairs.

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

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.

Front

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

Back

Add the valence electrons of all the atoms in the molecule.

Front

What is a lone pair of electrons?

Back

A lone pair is a pair of valence electrons that are not shared with another atom.

Front

What is the significance of Lewis structures?

Back

Lewis structures help visualize the arrangement of electrons in a molecule and predict its shape and reactivity.