Atoms & Isotopes

Front

What is an atom?

Back

The smallest unit of matter that retains the properties of an element.

Front

What are isotopes?

Back

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

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 do you determine the number of neutrons in an isotope?

Back

Subtract the atomic number from the mass number.

Front

What happens to an atom if it gains or loses electrons?

Back

It becomes an ion.

Front

What is a proton?

Back

A positively charged particle found in the nucleus of an atom.

Front

What is a neutron?

Back

A neutral particle found in the nucleus of an atom.

Front

What is the difference between an atom and an ion?

Back

An atom is neutral, while an ion has a net charge due to the loss or gain of electrons.

Front

What is the significance of the periodic table?

Back

It organizes elements based on their atomic number and properties.