History of the Atomic Theory

Who developed the planetary model of the atom?

• Niels Bohr

• Ernest Rutherford

• John Dalton

• Democritus

Democritus was known for

• discovering the electron

• discovering the proton

• creating the term atom, meaning indivisible

• discovering the nucleus

John Dalton said that all atoms of the same element are _________________.

• identical

• indestructible

• indifferent

• ironic

JJ Thomson discovered the

• nucleus

• proton

• neutron

• electron

Who created the plum pudding model?

• JJ Thomson

• Ernest Rutherford

• Niels Bohr

• John Dalton

What did Ernest Rutherford discover about the atom?

• The charge of the electron

• That the atom is a sphere

• The electron

• The proton

Tags

NGSS.HS-PS1-8

What did Niels Bohr discover about electrons?

• Electrons orbit the nucleus

• Protons circle the nucleus

• The nucleus circle the atom

• Electrons don't exist

Bohr's model of the atom was called

• Plum Pudding

• Billiard Ball

• Nuclear Model

• Planetary Model

James Chadwick discovered the

• electron

• proton

• neutron

• alpha particle

Tags

NGSS.HS-PS1-8

What two parts are in the nucleus of the atom?

• proton and electron

• proton and neutron

• neutron and electron

Tags

NGSS.HS-PS1-8