Atomic Structure

Front

What is the atomic number of an atom?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the chemical properties of the element.

Front

What is a neutron?

Back

A neutron is a subatomic particle found in the nucleus of an atom that has no electric charge.

Front

What is a proton?

Back

A proton is a positively charged subatomic particle located in the nucleus of an atom.

Front

What is matter?

Back

Matter is anything that has mass and takes up space.

Tags

NGSS.MS-PS1-5

Front

What is an electron?

Back

An electron is a negatively charged subatomic particle that is found in the electron cloud surrounding the nucleus of an atom.

Tags

NGSS.MS-PS2-3

Front

What is the nucleus of an atom?

Back

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

Front

What is the electron cloud?

Back

The electron cloud is the region around the nucleus of an atom where electrons are likely to be found.

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 the difference between atomic mass and mass number?

Back

Atomic mass is the weighted average mass of an atom's isotopes, while mass number is the total count of protons and neutrons.

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.