Average Atomic Mass

Front

What is the symbol for Fluorine-18?

Back

F-18

Front

How do you calculate the mass number of an atom?

Back

Mass number = Protons + Neutrons

Front

What do different isotopes of an element contain different numbers of?

Back

Neutrons

Tags

NGSS.HS-PS1-8

Front

In an ion, how does the number of protons compare to the number of electrons?

Back

The number of protons ≠ the number of electrons.

Tags

NGSS.HS-PS1-7

Front

What is the average atomic mass of an element?

Back

The weighted average of the masses of its isotopes.

Front

What is the formula to calculate average atomic mass using isotopic abundance?

Back

Average Atomic Mass = (mass1 * abundance1) + (mass2 * abundance2) + ...

Front

If an isotope has a mass of 39.946 amu and a relative abundance of 4.35%, what is its contribution to the average atomic mass?

Back

0.39 amu (39.946 * 0.0435)