John Dalton's atomic theory of matter?

Question

True or False


1.Atoms cannot be created or destroyed in a chemical reaction.

2.Atoms of different elements combine in whole number ratios to make compounds.

3. In chemical reactions, atoms are combined, separated or rearranged.

4. All matter is composed of extremely small particles called atoms.

5. All atoms of a given element are identicle in size mass and other properties.

6. Atoms cannot be subdivided.

Answer 1

Modern atomic theory is, of course, a little more involved than Dalton's theory but the essence of Dalton's theory remains valid. Today we know that atoms can be destroyed via nuclear reactions but not by chemical reactions. Also, there are different kinds of atoms (differing by their masses) within an element that are known as "isotopes", but isotopes of an element have the same chemical properties.