Atom and Subatomic Particles

The positive particle in an atom.

• proton

• neutron

• electron

• electron cloud

He proposed the atomic theory.

• Bohr

• Chadwick

• Dalton

• Rutherford

How many protons does Nitrogen have?

• 7

• 8

• 14

• 14.01

Tags

NGSS.MS-PS1-1

He believed that matter is made of small solid objects that cannot be divided, created, or destroyed called atomos.

• Aristotle

• Democritus

• Dalton

• Bohr

Tags

NGSS.HS-PS1-7

The negative particle in an atom.

• proton

• neutron

• electron

What is the mass number of this element?

• 7

• 8

• 14

• 14.01

Scientist that proposed that electrons move in energy levels around the nucleus.

• Dalton

• Rutherford

• Thomson

• Bohr

If an element has an atomic number of 11 and a mass number of 23, how many neutrons does it have?

• 11

• 12

• 23

• 34

Scientist who discovered the neutron.

• Bohr

• Chadwick

• Rutherford

• Thomson

The neutral particle in an atom.

• proton

• neutron

• electron