Atomic Theory

Who came up with the first atomic theory?

• Dalton

• Socrates

• Thomas

• Rutherford

What is a positively charged particle?

• neutron

• electron

• proton

• atom

Tags

NGSS.MS-PS2-3

What is a negatively charged particle?

• neutron

• electron

• proton

• atom

Tags

NGSS.MS-PS2-3

What is a particle with no charge?

• neutron

• electron

• proton

• atom

What did Rutherford discover in his experiment?

• nucleus

• electrons

• neutrons

• protons

Rutherford's "gold-foil" experiment using alpha particle scattering concluded that

• the center of the atom is empty

• atomic mass is spread over the whole atom

• the center of the atom has a negative charge

• most of the atom is empty

A tiny but very dense, positively charged portion of the atom that holds most of the atomic mass

• Electron Shells
• Orbitals
• Electron Cloud
• Nucleus

Tags

NGSS.HS-PS1-8

Who was considered as one of the founders of the ancient atomist theory?

• Aristotle

• Parmenides

• Empedocles

• Democritus

Who discovered the neutron?

• JOSEPH JOHN THOMSON

• ERNEST RUTHERFORD

• NEILS BOHR

• JAMES CHADWICK

Where are electrons located in an atom?

• Nucleus
• Electron Cloud
• Within a Proton
• Within a Neutron