Atom Review

A certain atom has 26 protons, 26 electrons, and 30 neutrons. Its mass number is ____.

• 26

• 30

• 52

• 56

Tags

NGSS.MS-PS1-1

John Dalton stated:

• elements are made of atoms

• atoms of a given element are identical

• atoms cannot be subdivided, created, nor destroyed

• all of the above

Tags

NGSS.HS-PS1-7

The scientist responsible for "discovering" the nucleus is:

• Bohr

• Rutherford

• Schroedinger

• Einstein

Tags

NGSS.HS-PS1-8

Which scientist developed the atomic theory?

• JJ Thomson

• Ernest Rutherford

• John Dalton

• James Chadwick

What did Thomson discover?

• electron

• proton

• neutron

• electron cloud

He claimed that matter was made of small, hard particles that he called “atomos.”

• Democritis

• Dalton

• Moseley

• Einstein

What scientist is best known for his "Chocolate Chip" model of the atom?

• J.J. Thomson

• Ernest Rutherford

• John Dalton

• Democritus

How many neutrons does Sodium have?

• 11

• 12

• 22.98977

• 23

Tags

NGSS.HS-PS1-1

James Chadwick discovered the ________.

• proton

• neutron

• electron

• nucleus

Tags

NGSS.HS-PS1-8

Particles in an atom that are neutral and have no charge are 

• negatrons 

• electrons 

• neutrons 

• protons