S2-Q1-Ch1 till Rutherford

Who first came up with the idea of an atom and called them "atomos"?

• Democritus

• Thomson

• Rutherford

• Bohr

Who, in 1897, discovered the electron?

• Dalton

• Rutherford

• Bohr

• Thomson

Who was the first contributor to the atomic theory?

• John Dalton

• Ernest Rutherford

• JJ Thompson

• Democritus

• Neils Bohr

Which scientist saw the atom as a solid sphere?

• Dalton
• Thomson
• Rutherford
• Bohr

Tags

NGSS.MS-PS1-1

the smallest particle of an element that retains the chemical properties of that element

• ion

• electron

• atom

• element

What is the mass ratio of the carbon to the hydrogen in the Methane CH₄ [if C=12; H=1]

• 1:4

• 3:2

• 3:1

• 4:1

if you know that the aromatic benzene formula is C₆H₆ . then the elements ratio is -------- [C=12; H=1]

• 6:6

• 1:6

• 1:1

• 3:3

if the ethylene is C₂H₄ , then the atomic ratio of the Hydrogen to the carbon respectively is ------------

• 2:4

• 4:2

• 1:2

• 2:1

Cathode rays ------

• has mass only

• has charged only

• has both mass and charge

• do not have either mass or charge

Which scientist is best known for his "Plum Pudding" model of the atom?

• J.J. Tomson

• Ernest Rutherford

• John Dalton

• Democritus