History of the Atom
This person discovered the electron through their Cathode Ray Tube experiment
Who is JJ Thomson?
Joseph John Thomson
The proton has this type of charge.
What is positively charged?
What is the atomic number of Oxygen?
8
What is a cation?
An atom or group of atoms with a positive charge.
This type of ion is called an ___(Cation/Anion)______ because electrons are lost.
cation
This chemist THOUGHT of the idea that matter is made up of indivisible particles called "atomos."
Who is Democritus?
What is the charge of a neutron?
Neutral
How many protons are in a neutral atom of Carbon?
6
What is an anion?
An atom or group of atoms with a negative charge
The number 19 in Fluorine-19 represents....
The mass number
This chemist discovered the proton through his experimental evidence.
Who is Eugene Goldstein?
They are the three subatomic particles.
What are protons, electrons, and neutrons?
What does the atomic number tell you about an element?
The number of protons in an element
A Fluorine atom gains an electron and becomes....
Negative
This element has an average atomic mass of 79.904. What element is it?
Bromine
Who discovered neutrons?
Most of the mass comes from these two subatomic particles
Protons and Neutrons
If an element has an atomic number of 20, which element is it?
Calcium
What charge does a Calcium ion have after it loses two electrons?
+2
How many protons are in Pb-206? Pb-207? Pb-204?
82 ,82, 82
What was Rutherford's major contribution to the atomic theory?
He discovered the nucleus through the Gold Foil Experiment
Answers can vary slightly
How does the atomic number relate to the number of electrons in a neutral atom?
Atomic number equals the number of electrons in a neutral atom
Describe how the charge of an ion is determined.
It is the difference between the number of protons and electrons
How many neutrons are there in Pb-206? Pb-207? Pb-204?
124, 125, 122