Dalton’s Atomic Theory

Question 1

Elements are composed of minute, discrete, and indivisible particles called atoms which maintain their identity in all physical and chemical changes.

Answer 1

Postulate 1

Question 2

Atoms of the same element are identical in physical and chemical properties, and have the same mass. Atoms of different elements differ inn physical and chemical properties and have different masses.

Answer 2

Postulate 2

Question 3

The chemical combination of two or more elements consists of the union of the atoms of these elements in simple numerical ratios to form the smallest possible unit particles of a compound.

Answer 3

Postulate 3

Question 4

Atoms of the same element can unite in more than one ratio to form more than one compound.

Answer 4

Postulate 4