Question

In 1808, John Dalton proposed a series of statements regarding the atom that became known as Dalton's postulates or Dalton's atomic theory. Since Dalton's original proposal, some of the statements have been updated or changed due to new discoveries. Which of the statements was not a part of Dalton's original atomic theory? 1) Different elements have atoms of different masses and properties. 2) All four statements are part of Dalton's original atomic theory. 3) Matter is comprised of small particles called atoms. 4) Atoms cannot be created or destroyed in a chemical reaction. 5) Atoms of the same element have the same size, mass, and structure.

Answer 1

2) All four statements are part of Dalton's original atomic theory.

Step-by-step explanation:

The postulates of the Dalton’s atomic theory are:

• The matter is comprised of small units which are known as atoms.
• The atoms are indivisible which means that they can not be further divided.
• Atoms of the matter can neither be created nor be destroyed in the chemical reaction.
• All atoms of the particular element are identical.
• The atoms of the different elements vary in the size and the mass. and posses different properties.
• The compounds are formed by the different whole number combinations of the atoms.

Hence, all 4 are correct.