2024 Unit 3 Review: Atomic Theory

Front

What is an isotope?

Back

An atom with different amounts of neutrons.

Front

What is the mass number of Strontium-80?

Back

80.

Front

Who proposed that electrons move around the nucleus in circular orbits?

Back

Bohr.

Front

How many protons are in Neon?

Back

10.

Front

Who came up with the Rutherford model of the atom?

Back

Rutherford.

Front

What is the atomic number?

Back

The number of protons in the nucleus of an atom.

Front

What is the difference between an atom and a molecule?

Back

An atom is a single unit of an element, while a molecule is a group of two or more atoms bonded together.

Front

What is the nucleus of an atom?

Back

The central part of an atom, containing protons and neutrons.

Front

What are electrons?

Back

Negatively charged subatomic particles that orbit the nucleus of an atom.

Front

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

Back

It is a standard unit of mass that quantifies mass on an atomic or molecular scale.