Atoms, Ions, Isotopes & Bohr Models Review

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element, consisting of a nucleus surrounded by electrons.

Front

What is an ion?

Back

An ion is an atom or molecule that has gained or lost one or more electrons, resulting in a net electrical charge.

Front

What is an isotope?

Back

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons.

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

How do you calculate the number of neutrons in an atom?

Back

Number of neutrons = Mass number - Atomic number.

Front

What happens to the charge of an atom when it loses electrons?

Back

The charge becomes positive when an atom loses electrons.

Front

What is the Bohr model?

Back

The Bohr model is a theory of atomic structure that depicts electrons orbiting the nucleus in defined energy levels.

Front

What is the significance of the atomic mass?

Back

The atomic mass is the weighted average mass of an element's isotopes, reflecting the relative abundance of each isotope.

Front

How many electrons does a neutral magnesium atom have?

Back

A neutral magnesium atom has 12 electrons.