Atomic Theory and Structure Chem I H

Front

What is the Electron Cloud Model?

Back

A model of the atom where electrons are found in regions of probability around the nucleus, rather than in fixed orbits.

Front

What is the Bohr Model?

Back

A model of the atom that depicts electrons traveling in fixed orbits around the nucleus, with quantized energy levels.

Front

What is the atomic number?

Back

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

Front

What is atomic mass?

Back

The weighted average mass of an atom's isotopes, typically measured in atomic mass units (amu).

Front

What is an isotope?

Back

Atoms of the same element that have the same number of protons but different numbers of neutrons.

Front

What is the nucleus of an atom?

Back

The central part of an atom, containing protons and neutrons, and accounting for most of the atom's mass.

Front

What is the charge of an electron?

Back

Electrons have a negative charge of -1.

Front

What is the charge of a proton?

Back

Protons have a positive charge of +1.

Front

What is the charge of a neutron?

Back

Neutrons have no charge (neutral).

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.