models of atoms 9.4

Whose model suggested that negative particles were mixed in with positively charged material - like seeds in a watermelon?

• J.J. Thomson

• Ernest Rutherford

• Niels Bohr

• Albert Einstein

Tags

NGSS.HS-PS1-3

Who discovered that the atom had an small, dense, positively charged center?

• Ernest Rutherford

• J.J Thomson

• Robert Millikan

• John Dalton

Tags

NGSS.HS-PS1-8

Who named the positive center of the atom the "nucleus?"

• Democritus

• Dalton

• Thomson

• Rutherford

Which scientists believed an atom was indivisible? (Choose all correct responses.)

• Democritus

• Dalton

• Thomson

• Rutherford

Which scientist discovered that the atom has parts - which means it can be divided?

• Democritus

• Dalton

• Thomson

• Rutherford

Which scientist believed that elements differed from one another because their atoms had different mass?

• Democritus

• Dalton

• Thomson

• Rutherford

In the atomic model nicknamed the "plum pudding" model, what do the plums represent?

• the nucleus

• the atom

• the electrons

• the positive material

Tags

NGSS.MS-PS1-1

Which scientist proposed a new atomic model after discovering the electron in 1897?

• Dalton

• Thomson

• Rutherford

• Bohr

Who discovered that atoms are mostly empty space?

• Dalton

• Thomson

• Rutherford

• Bohr

Who proposed that electrons move around the nucleus in circular orbits?

• Dalton

• Thomson

• Rutherford

• Bohr