3B Mr. Wessler Green group Chemistry

The Atomic mass is the number of protons in an element.

What tool was used Thomson’s experiment?

What are the electrons in Thomson´s model surrounded by?

What is the amount of energy required to move an electron from energy to another energy level?

If you take out neutrons from an atom would their be change in the atomic number.

Who discovered atomic mass?

Part the atom can be excited to higher energy levels by absorbing energy in the surroundings?

When was Dalton’s model discovered?

In what year did J.J Thomson discover isotopes?

John Dalton was right about the atom being indivisible.

Niels bohr created the quantum theory.

When was the theory discovered?

How can you find the mass of an atom?

What theory did Bohr propose about a certain atom based on a quantum theory ?

Do isotopes have the same number of protons and electrons?

Was Rutherford’s theory perfect?