Review Atoms, Ions, Isotopes

Front

What is an atom?

Back

The smallest unit of an element, consisting of protons, neutrons, and electrons.

Front

What is an ion?

Back

An atom or molecule that has a net electrical charge due to the loss or gain of one or more electrons.

Front

What is an isotope?

Back

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

Front

How do you determine the number of neutrons in an isotope?

Back

Subtract the atomic number (number of protons) from the mass number.

Front

What is a cation?

Back

A positively charged ion formed when an atom loses one or more electrons.

Front

What is an anion?

Back

A negatively charged ion formed when an atom gains one or more electrons.

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 the mass number?

Back

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

Front

How many valence electrons does aluminum have?

Back

Aluminum has 3 valence electrons.

Front

What happens to the number of electrons in a +3 cation of aluminum?

Back

It loses 3 electrons, resulting in 10 electrons remaining.