Atom Basics

Front

What is the nucleus of an atom?

Back

The nucleus is the central part of an atom where most of its mass is concentrated. It contains protons and neutrons.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What particle identifies an element?

Back

The number of protons in the nucleus uniquely identifies an element.

Front

What are electrons?

Back

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

Front

What is the mass of an atom mostly made up of?

Back

Most of the mass in an atom is concentrated in the nucleus.

Front

What is empty space in an atom?

Back

Empty space in an atom refers to the area around the nucleus where electrons are found, making up most of the atom's volume.

Front

How many protons does an element with atomic number 3 have?

Back

An element with atomic number 3 has 3 protons.

Front

What is the relationship between protons and atomic number?

Back

The atomic number of an element is equal to the number of protons in its nucleus.

Front

What are neutrons?

Back

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

Front

What is the difference between protons and electrons?

Back

Protons are positively charged particles in the nucleus, while electrons are negatively charged particles that orbit the nucleus.