The Structure of the Atom – Module 3 Test

Front

What did Bohr propose about electron movement?

Back

Electrons move around the nucleus in specific paths at fixed distances from the nucleus.

Front

What is the smallest particle that retains the properties of an element?

Back

Atom

Front

What is the average atomic mass of Rhenium?

Back

186.20 amu

Front

What did J.J. Thomson discover about atoms?

Back

Atoms contain negatively charged particles.

Front

How do you calculate the number of neutrons in an isotope given its nuclear symbol?

Back

Subtract the atomic number from the mass number.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus.

Front

What are isotopes?

Back

Atoms of the same element with different numbers of neutrons.

Front

What is the charge of a proton?

Back

Positive.

Front

What is the charge of a neutron?

Back

Neutral.