Albert Einstein theorized that this Brownian motion
1905
100
The rows of the periodic table are called:
periods
100
What is C?
Neutrons
100
Charge of a Proton?
Postive
200
Proposed a mechanical universe with small solid masses in motion.
John Dalton
200
Discovery of protons
1919
200
The columns of the periodic table are called:
groups.
200
What is A?
Electrons
200
Charge of a neutron
negative
300
Studied "canal rays" and found they were associated with the proton H + .
J.J Thompson
300
Discovery of neutrons.
1920
300
All of the elements in a period have the same:
atomic weight
number of atomic shells
300
What is B?
Protons
300
Charge of an electron?
Neutral
400
He discovered that the nuclei of certain light elements, by the impact of energetic alpha particles coming from some radioactive source, and that during this process fast protons were emitted.
Ernest Rutherford
400
When thomas discovered electrons.
1897
400
All of the elements in a group have the same number of:
neutrons
electrons in their outer shell
400
What is D?
Nucleus
400
Charge of alex?
Positive :D
500
Published the famous equation E=mc 2
Albert Einstein
500
Gay-Lussac...s law or J.A.C. Charles...s law, published in ..