Atomic Theory and Structure

Front

What is the limitation of the Bohr Model?

Back

The Bohr Model did not explain the movement of electrons or the interaction between the subatomic particles.

Front

What did Rutherford's model fail to explain regarding electrons?

Back

Rutherford's model failed to explain why the negatively charged electrons were not pulled into the positively charged nucleus.

Front

What does the evolution of atomic theory demonstrate about the scientific process?

Back

Theories change as new information becomes available.

Front

What is an isotope?

Back

Two or more forms of the same element that have the same number of protons but different numbers of neutrons.

Front

Who discovered the neutron and won the Nobel Prize for Physics in 1935?

Back

James Chadwick discovered the neutron.

Front

What is atomic theory?

Back

Atomic theory is the scientific theory that matter is composed of discrete units called atoms.

Front

What is the atomic number?

Back

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

Front

What is the mass number?

Back

The mass number is the total number of protons and neutrons in an atom's nucleus.

Front

What are subatomic particles?

Back

Subatomic particles are the particles that make up an atom, including protons, neutrons, and electrons.

Front

What is the charge of a proton?

Back

A proton has a positive charge.