John Dalton and Atomic Theory Quiz

What was John Dalton's profession before he became known for his work in chemistry?

• Mathematician

• Biologist

• Physicist

• School Teacher

Which law states that the elements in a compound are always in the same ratio?

• Law of Constant Proportions

• Law of Definite Composition

• Law of Multiple Proportions

• Law of Conservation of Mass

What is the fixed ratio of hydrogen to oxygen in water according to the law of definite composition?

• 1:1

• 2:1

• 1:2

• 2:2

According to the law of multiple proportions, what kind of numbers represent the ratios of elements in different compounds?

• Fractional numbers

• Decimal numbers

• Small whole numbers

• Large whole numbers

Which of the following compounds is an example of the law of multiple proportions?

• Methane and ethane

• Sodium chloride and sodium bromide

• Carbon dioxide and carbon monoxide

• Water and hydrogen peroxide

What did John Dalton propose about the nature of atoms in his atomic theory?

• Atoms are divisible

• Atoms are indestructible

• Atoms are visible

• Atoms are flexible

Which postulate of Dalton's atomic theory was later found to be incorrect due to the discovery of isotopes?

• Atoms combine in simple whole number ratios

• Atoms of the same element have the same mass

• Atoms are indestructible

• Atoms are indivisible

What is the result of a chemical reaction according to Dalton's atomic theory?

• Creation of new atoms

• Fusion of atoms

• Destruction of atoms

• Rearrangement of atoms

What model did John Dalton propose for the atom?

• Plum pudding model

• Planetary model

• Solid sphere model

• Nuclear model

Which concept did Dalton's atomic theory help to establish in chemistry?

• Radioactivity

• Periodic table

• Quantum mechanics

• Chemical reactions as rearrangements of atoms