History of the Atom

What is the neutral particle in the nucleus called?

• neutron

• quark

• electron

• proton

All matter is made of -

• electrons

• atoms

• compounds

• energy

Tags

NGSS.MS-PS1-1

What is the particle with one positive charge called?

• electron

• proton

• quark

• neutron

Who is the scientist who proposed the "solar system" model of an atom where the electrons orbit around the nucleus?

• Democritus

• Chadwick

• Ernest Rutherford

• Niels Bohr

Rutherford's Gold Foil Experiment provided evidence that

• gold is not as dense as previously thought

• negative and positive charges are spread evenly throughout the atom

• there is a dense positively charged nucleus at the center of an atom

• alpha particles have a positive charge

Tags

NGSS.HS-PS1-8

Which scientist discovered the electron?

• Bohr

• Thomson

• Dalton

• Aristotle

Who was the Greek philosopher who called the smallest particle of matter an "atom"?

• Democritus

• Aristotle

• Einstein

• JJ Thomson

In Dalton's Atomic Theory, all elements consist of ___________ that cannot be divided.

• molecules

• hydrogen

• atoms

• parts

Which of the following is not part of Dalton's Atomic Theory?

• Atoms that combine do so in simple, whole number ratios

• Atoms of the same element are always identical

• All elements are composed of atoms.

• Atoms are always in motions

What number indicates the nucleus?

• 3

• 2

• 4

• 1