FriQ10 - Atomic History & Isotopes

Who is credited with first proposing the concept of matter being made of atoms?

• Democritus

• John Dalton

• JJ Thomson

• Robert Millikan

• Ernest Rutherford

Who generated the first theory of the atom, which included explanations of compounds and chemical reactions?

• Democritus

• John Dalton

• JJ Thomson

• Robert Millikan

• Ernest Rutherford

Who determined that all atoms contain electrons?

• Democritus

• John Dalton

• JJ Thomson

• Robert Millikan

• Ernest Rutherford

Who determined the charge of a single electron?

• Democritus

• John Dalton

• JJ Thomson

• Robert Millikan

• Ernest Rutherford

Who determined that all atoms have a dense, positively charged nucleus?

• Democritus

• John Dalton

• JJ Thomson

• Robert Millikan

• Ernest Rutherford

How many protons are in hydrogen-3?

• 1

• 2

• 3

How many neutrons are in hydrogen-3?

• 1

• 2

• 3

How many neutrons are in beryllium-9?

• 4

• 5

• 9

How many protons are in beryllium-9?

• 4

• 5

• 9

How many protons are in nitrogen-13?

• 6

• 7

• 13