Atoms & Isotopes

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element. It consists of a nucleus containing protons and neutrons, surrounded by electrons.

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, resulting in different atomic masses.

Front

What is the symbol for Fluorine-18?

Back

The symbol for Fluorine-18 is 18F.

Front

How many protons does Lithium have?

Back

Lithium has 3 protons.

Front

What is the atomic number of an element?

Back

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

Front

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

Back

To calculate the number of neutrons, subtract the atomic number (number of protons) from the mass number (total number of protons and neutrons).

Front

What is the mass number of an isotope?

Back

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

Front

How many neutrons are in Carbon-13?

Back

Carbon-13 has 7 neutrons.

Front

How many neutrons are in Nitrogen-16?

Back

Nitrogen-16 has 9 neutrons.

Front

What is the relationship between protons and the identity of an element?

Back

The number of protons in an atom determines the element's identity; changing the number of protons changes the element.