Atomic Structure

Front

Which subatomic particle determines the identity of an element?

Back

Protons are the subatomic particles that determine the identity of an element. Each element has a unique number of protons.

Front

What is the number of protons in the element with atomic number 7?

Back

The element with atomic number 7 is nitrogen, which has 7 protons.

Front

Subatomic particles with a negative charge?

Back

Electrons are the subatomic particles that carry a negative charge.

Front

The mass number of an isotope is equal to the number of ______ in an atom.

Back

The mass number of an isotope is equal to the number of protons + neutrons in an atom.

Front

Most of the mass in an atom is made up of _____________________?

Back

Most of the mass in an atom is made up of protons and neutrons.

Front

What are neutrons?

Back

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

Front

What is the charge of protons?

Back

Protons have a positive charge.

Front

Define 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 an isotope?

Back

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

Front

What is the nucleus of an atom?

Back

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