Introduction to Atoms

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

Front

What are protons?

Back

Protons are positively charged particles found in the nucleus of an atom.

Front

What are neutrons?

Back

Neutrons are neutral particles found in the nucleus of an atom, contributing to its mass.

Front

What are electrons?

Back

Electrons are negatively charged particles that orbit the nucleus of an atom.

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

What is the nucleus?

Back

The nucleus is the central part of an atom, containing protons and neutrons.

Front

What is the Thomson model of the atom?

Back

The Thomson model, also known as the 'plum pudding model', describes the atom as a sphere of positive charge with negatively charged electrons embedded within it.

Front

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

Back

To find the number of neutrons, subtract the atomic number from the mass number.

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances and is made up of only one type of atom.