Atomic Structure

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element, consisting of a nucleus surrounded by electrons.

Front

What are protons?

Back

Protons are positively charged particles found in the nucleus of an atom. The number of protons determines the atomic number and identity of the element.

Front

What are neutrons?

Back

Neutrons are neutral particles found in the nucleus of an atom. They contribute to the mass of the atom but do not affect its charge.

Front

What are electrons?

Back

Electrons are negatively charged particles that orbit the nucleus of an atom. They are involved in chemical bonding and reactions.

Front

What is the mass number of an atom?

Back

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

Front

What is an isotope?

Back

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

Front

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

Back

Number of Neutrons = Mass Number - Atomic Number.

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 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 difference between atomic mass and mass number?

Back

Atomic mass is the weighted average mass of an element's isotopes, while mass number is the total count of protons and neutrons in a specific isotope.