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

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

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

• Nucleus

• electron

• proton

• atom

Tags

NGSS.MS-PS1-1

What is the center of an atom called?

• nucleus

• electron cloud

• proton center

• photon center

Tags

NGSS.HS-PS1-8

Which one of the following is the correct order of scientific contribution of the atom?

• Chadwick, Dalton, Bohr, Rutherford, Democritus,Thomson

• Thomson, Democritus,Rutherford, Bohr, Dalton ,Chadwick

• Dalton, Chadwick ,Bohr, Rutherford, Democritus,Thomson

• Democritus, Dalton, Thomson, Rutherford, Bohr, Chadwick

Who was the first person to come up with the Atomic Theory which included four parts.

• John Dalton

• Democritus

• Ernest Rutherford

• Niels Bohr

Who developed the Quantum Mechanical Model?

• Erwin Schrodinger
• Joseph Thomson
• James Chadwick
• Ernest Rutherford

Who discovered that the nucleus contains positively charged particles called protons?

• Ernest Rutherford
• James Chadwick
• Democritus
• Niels Bohr