Atomic Model

Front

How do scientists know how atoms are structured?

Back

By running experiments that expose their properties.

Front

Where does the majority of an atom's mass exist?

Back

In the nucleus.

Front

Which subatomic particle has a negative charge?

Back

Electron.

Front

What must be true for an atom to be neutral?

Back

The atom has the same number of protons and electrons.

Front

What is the nucleus of an atom?

Back

The central part of an atom that contains protons and neutrons.

Front

What is an electron cloud?

Back

The region around the nucleus where electrons are likely to be found.

Front

What charge do protons have?

Back

Positive charge.

Front

What is the mass of a neutron compared to a proton?

Back

A neutron has approximately the same mass as a proton.

Front

What is the role of electrons in an atom?

Back

Electrons are involved in chemical bonding and reactions.

Front

What is an isotope?

Back

Atoms of the same element with different numbers of neutrons.