Structure of Atoms

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 surrounded by electrons.

Front

What are the main components of an atom?

Back

The main components of an atom are protons, neutrons, and electrons. Protons and neutrons are found in the nucleus, while electrons orbit around the nucleus.

Front

What is the charge of a proton?

Back

A proton has a positive charge.

Front

What is the charge of a neutron?

Back

A neutron has no charge (it is neutral).

Front

What is the charge of an electron?

Back

An electron has a negative charge.

Front

What is the nucleus of an atom?

Back

The nucleus is the central part of an atom, containing protons and neutrons. It is positively charged due to the presence of protons.

Front

What is 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 mass number?

Back

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

Front

What is an isotope?

Back

An isotope is a variant of an element that has the same number of protons but a different number of neutrons.

Front

What is the electron cloud?

Back

The electron cloud is the region around the nucleus where electrons are likely to be found. It represents the probability distribution of electrons.