Atomic Models

Which scientist proposed a new model of the atom after the discovery of the electron in 1897? His model consisted of electrons embedded in a sea of positive charge like seeds in a watermelon.

• J.J. Thomson

• Ernest Rutherford

• Niels Bohr

• Albert Einstein

What contribution did John Dalton make to the atomic theory?

• He discovered that every atom was positively charged
• He discovered that every element consisted of one type of atom
• He discovered that atoms had nuclei
• He discovered that atoms could be divided into smaller parts

Tags

NGSS.HS-PS1-7

This was the first model of the atom ever proposed. It was simple and described atoms as tiny spheres that could not be broken down into smaller pieces.

• Democritus's model of the atom
• The "Plum Pudding Model" of the atom
• The "Rutherford Model" of the atom
• The "Quantum Mechanical Model" of the atom

Tags

NGSS.MS-PS1-1

This model added on to previous models by showing electrons existed at certain "energy levels" outside a nucleus.

• The "Bohr Model" of the atom

• The "Rutherford Model" of the atom

• Thomson's "Plumb Pudding Model" of the atom

• Schrodinger's "Quantum Mechanical Model" of the atom

Tags

NGSS.HS-PS1-1

His atomic model was the first to include a positive nucleus in an atom, surrounded by negatively charged particles

• Joseph Thomson

• Niels Bohr

• Ernest Rutherford

Idea was of an indivisible particle of matter he called "atomos"

• John Dalton
• Aristotle
• Democritus
• Plato

Discovered the nucleus

• Democritus
• Robert Millikan
• James Chadwick
• Ernest Rutherford

Which scientist discovered the electron?

• Bohr
• Rutherford
• Dalton
• Thomson

Which scientist thought that electrons orbit the nucleus in specific rings?

• Bohr
• Rutherford
• Dalton
• Thomson

Discovered the electron and thus electrical charges.

• Joseph Thomson

• John Dalton

• Ernest Rutherford

• Robert Millikan