End of module 3 Review Packet

Front

What subatomic particles are found in the nucleus of an atom?

Back

Protons and Neutrons.

Front

What is the average atomic mass of Rubidium if it has two isotopes with relative masses 84.9118 amu (27.8% abundance) and 86.9092 amu?

Back

72.1% abundance of 85Rb.

Front

What does the atomic number of an element represent?

Back

The number of protons in the nucleus.

Front

Calculate the average atomic mass of Iron (Fe) given the following isotopes: Iron 54 (6% abundance), Iron 56 (92% abundance), Iron 57 (2% abundance).

Back

55.9 amu.

Front

Which particles have a charge?

Back

Protons and Electrons.

Front

Define an isotope.

Back

Atoms of the same element with different numbers of neutrons.

Front

What is the charge of a proton?

Back

Positive charge.

Front

What is the charge of an electron?

Back

Negative charge.

Front

What is the mass of a neutron compared to a proton?

Back

Approximately equal to a proton.

Front

What is the significance of the atomic mass unit (amu)?

Back

It is a standard unit of mass used to express atomic and molecular weights.