Atomic Theory Timeline
Structure of an Atom
Radioactive Decay
Subatomic Particle
100
What word does “atom” come from?
Atomos
100
What is located in the center of an atom?
The nucleus
100
What are the types of radioactive decay?
Alpha Decay, Beta Decay, and Gamma Decay.
100
How many protons are in Rb.
37 protons
200
Who led to the “death of chemistry” for 2000 years?
Aristotle
200
Are protons positively or negatively charged?
Positively Charged
200
What is changed during radioactivity?
The nucleus of the atom.
200
What is the Mass of Calcium-41
41
300
Who discovered the electron?
J.J. Thomson
300
Where are electrons located?
Outside of the nucleus in the electron cloud
300
Is this alpha decay or beta decay?
Beta decay
300
How many Protons and Neutrons are in Chlorine-36
Protons- 17
Neutrons-19
400
Why is Ernest Rutherford important to the Atomic Theory?
He discovered the nucleus and that electrons are scattered outside of the nucleus.
400
What particle is neutrally charged?
Neutron
400
What is the alpha decay equation for Radium-226?
400
What is the most common isotope of Ruthenium? Written in isotope notation.
Ruthenium-101
500
Who formulated the first atomic theory since the “death of chemistry”?
John Dalton
500
What is the charge of an electron?
-1
500
How is an electron created in Beta Decay?
A neutron will change into a proton and emit the electron out of the nucleus.
500
Element: Oxygen-17
Tell me: Symbol, Atomic Number,Protons, Neutrons, Electrons, and Mass.
O, 8,8,9,8, 17