Dalton's contribution was different from thatof the ancient Greeks who populated the existence of atoms. Point out the difference between the two ideas.

See explanation

Explanation:

The Greeks held the belief that atoms where spherical. However, they thought that atoms of elements where different for the different states of mater. Dalton brought about the idea that the atoms of the same element are exactly alike irrespective of the physical state of the system.

Dalton introduced the idea that chemical reactions result from rearrangement of atoms in molecules. This idea was not captured by the early Greeks.

im pretty sure its b

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.