Structure of the atom

Thompson was the first to discover a subatomic particle - the electron. What are the others?

• neutrons & positrons

• protons & neutrons

• positrons & quarks

• protons & positrons

Tags

NGSS.MS-PS1-1

Neutrons (discovered by James Chadwick in 1932) are neutral subatomic particles that are located

• in and outside the nucleus.

• in the nucleus.

• just outside the nucleus.

• in alternate universes.

Tags

NGSS.MS-PS1-1

Neutrons have almost exactly the same mass as

• electrons.

• positrons.

• protons.

• quarks.

Tags

NGSS.HS-PS1-8

Rutherford proved the existence of protons located in a very small nucleus by using a crude particle accelerator in 1911.

• True

• False

Tags

NGSS.HS-PS1-8

Because atoms are neutral, each positive charge is

• the same as a neutral charge.

• balanced by a negative charge.

• the same as no charge.

• balanced by a neutral charge.

Tags

NGSS.MS-PS1-1

Which particle has almost no mass?

• Protons

• Neutrons

• Electrons

Most of the atom is empty space.

• True.

• False.

All matter is made of

• energy

• electrons

• atoms

• compounds

Tags

NGSS.MS-PS1-1

Bohr discovered that electrons are located in

• the nucleus

• inside protons

• electron cloud

• circular orbits around the nucleus

Neutrons are

• negative

• positive

• neutral