Atomic Structure, Isotopes and Ions

Front

What is the atomic structure of an atom?

Back

An atom consists of a nucleus containing protons and neutrons, surrounded by electrons in orbitals.

Front

What are isotopes?

Back

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

Front

What is an ion?

Back

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

Front

What is a cation?

Back

A cation is a positively charged ion, formed when an atom loses one or more electrons.

Front

What is an anion?

Back

An anion is a negatively charged ion, formed when an atom gains one or more electrons.

Front

What subatomic particle has a negative charge?

Back

Electrons have a negative charge.

Front

What subatomic particle has a positive charge?

Back

Protons have a positive charge.

Front

What is the mass number of an atom?

Back

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

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 the significance of the atomic number?

Back

The atomic number defines the element and is equal to the number of protons in the nucleus.