Show:
Atom's Discoverers
Parts of the Atom
Discover Years
Periodic Table of Elements
Changes of States
100
This man discovered that atoms were mostly empty space with a dense positive center. HE IS ALSO THE STUDENT OF J.J THOMPSON.
Who is Ernest Rutherford?
100
The middle part of the atom that is made up of two parts and is small,dense, and has a positive charge.
What is a nucleus?
100
This year was the year when John Dalton made Dalton's Atomic Theory.
When was 1803?
100
The biggest part of the element square and is the abbreviation of the element.
What is a chemical symbol?
100
When a liquid turns into a solid?
What is freezing?
200
This man discovered that atoms were made from smaller particles called electrons. He also created the Plum Pudding model.
Who is J.J Thompson?
200
The outer part of the atom and is super small. It is found in a Electron Cloud and has a negative charge.
What is an electron?
200
This was the about the year when Democritus talked about the smallest thing to cut into called an atom.
When was 440 B.C?
200
The part of the element square that has the name of the element and is below the Chemical symbol
What is an element name?
200
When a solid turns into a liquid
What is melting?
300
This man made a theory that says that all things are made up of atoms.
Who is John Dalton?
300
It is the part that is found in the nucleus and has a positive charge.
What is a proton?
300
This was the year when Rutherford discovered that atoms were mostly empty with a small dense nucleus.
When was 1909?
300
The top of the element square that shows the number of protons of the element
What is Atomic number?
300
When you add energy to a liquid
What is evaporation?
400
This man discovered that atoms traveled on energy levels around the nucleus.
Who is Niels Bohr?
400
It is found in the nucleus and has NO electrical charge and has about the same mass as the proton.
What is neutron?
400
The was the year when J.J Thompson discovered electrons.
When was 1897?
400
The bottom of the element square that tells you the mass of the atom of the element
What is the Atomic mass?
400
When you lose energy from a gas
What is condensation?
500
The man is a Greek philosopher in 400 B.C and is the first person who ever talked about atoms.
Who is Democritus?
500
The part of the atom that holds the electrons around the atom in energy order.
What is the electron cloud?
500
this was the year when the discoverer discovered that atoms had electron levels.
When was 1913?
500
The 72nd element on the periodic table and has the atomic mass of 178.5
What is Hafnium?
500
When you a lot of energy to a solid and jumps straight to a gas?
What is sublimation?