Atomic Theory Quiz

Who first proposed the idea of indivisible particles called ‘atoms’?

• Aristotle

• Dalton

• Lavoisier

• Democritus

What did Democritus believe atoms differed in?

• Color and smell

• Temperature

• Weight

• Size and shape

Which philosopher disagreed with Democritus and proposed that matter was made of earth, air, fire, and water?

• Socrates

• Plato

• Proust

• Aristotle

Who is credited with the law of conservation of mass?

• Joseph Proust

• J.J. Thomson

• John Dalton

• Antoine Lavoisier

How did Lavoisier confirm his law of conservation of mass?

• By heating metals

• By using cathode ray tubes

• By studying gases

• By weighing substances before and after a chemical reaction

Who proposed the law of definite proportions?

• Democritus

• William Prout

• Ernest Rutherford

• Joseph Proust

What did the law of definite proportions state?

• Mass is conserved

• Atoms are indivisible

• Atoms can be split

• Elements in a compound always combine in the same proportion

Whose work did John Dalton build upon for his atomic theory?

• Aristotle and Plato

• Democritus and Prout

• Rutherford and Bohr

• Lavoisier and Proust

Dalton believed that atoms of the same element are:

• Different in size

• Charged particles

• Made of hydrogen

• The same in mass and properties

Dalton’s theory stated that atoms combine in:

• Random ratios

• Unequal ratios

• Proportions of five to four

• Simple whole-number ratios