Summarize Scientists Atomic Theory

Question 1

Summarize Dalton:

Answer 1

All elements are composed of atoms that cannot be divided
All atoms of the same element are exactly alike and have the same mass. Atoms of different elements are different and have different masses
An atom of one element cannot be changed into an atom of a different element. Atoms cannot be created or destroyed in any chemical change, only rearranged.
Every compound is composed of atoms of different elements, combined in a specific ratio.

Question 2

Summarize Thomson:

Answer 2

Atoms contain negatively charged particles embedded in a positive sphere

Question 3

Summarize Rutherford:

Answer 3

An atom’s charge must be centered in the atom, called the nucleus.

Question 4

Summarize Bohr

Answer 4

Electrons could have only specific amounts of energy, leading them to move in certain orbits.