History of the Atom

Which one of the following discoveries came first?

• electrons

• neutrons

• quarks

• atoms

Which scientist discovered the electrons?

• Dalton

• Thomson

• Atristotle

• Bohr

Rutherford and his students did experiments that showed

• quark

• nucleus

• proton

• electron

Tags

NGSS.MS-PS1-1

Bohr discovered that electrons are located in

• the nucleus

• inside protons

• electron cloud

• circular orbits around the nucleus

Which scientist discovered that the nucleus contained neutrons?

• bohr

• Rutherford

• Dalton

• Chadwick

What is a particle with one negative charge called?

• electron

• proton

• quark

• neutron

The smallest particle of an element that still represents that element.

• Nucleus

• electron

• proton

• atom

Tags

NGSS.MS-PS1-1

What is a particle with one positive charge called?

• proton

• electron

• neutron

• quark

What is the neutral particle found in the nucleus called?

• proton

• neutron

• electron

• quark

What is the center of an atom called?

• nucleus

• electron cloud

• proton center

• photon center

Tags

NGSS.MS-PS1-1