Question

Which contribution is a modification to Dalton's original atomic model? a.Atoms are indivisible. b. Electrons are scattered in an atom.c. Atoms are the smallest unit of an element. d.Atoms of the same element have the same properties.

Answer 1

Answer: b. Electrons are scattered in an atom

Explanation:

Postulates of Dalton's atomic theory:

a) Atom are indivisible and are the smallest unit of any matter.

b) Atoms of same element have same mass.

c) Atoms of different elements differ in mass.

d) Elements combines with each other in whole number to form compounds.

Electrons are scattered in an atom which was given by J.J Thomson in his plum pudding model.

Thus the modification to Dalton's original atomic model is Electrons are scattered in an atom

Answer 2

B. Electrons are scattered in an atom. Dalton only came to the conclusion at atoms existed, not their contents. He did this by using gases and making them react and made observations about the gases.