Atomic Mass/Number and Valence Electrons

Front

What is atomic mass?

Back

The weighted average mass of an atom's isotopes, measured in atomic mass units (amu).

Front

What is atomic number?

Back

The number of protons in the nucleus of an atom, which determines the element's identity.

Front

What particle has no charge?

Back

Neutron.

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus of an atom.

Front

How do you calculate the number of neutrons in an atom?

Back

Subtract the atomic number from the mass number.

Front

What are valence electrons?

Back

Electrons in the outermost shell of an atom that are involved in chemical bonding.

Front

How many valence electrons does Nitrogen have?

Back

5 valence electrons.

Front

What is the significance of valence electrons?

Back

They determine how an atom will bond with other atoms.

Front

What is the atomic mass of Nitrogen?

Back

14.007 amu.

Front

How many electrons are in a neutral atom of Nitrogen?

Back

7 electrons.