Scientists contributing to the atomic theory.
experiments contributing to atomic theory.
periodic table of elements.
About the Atom
About Scientist
100
A scientist born around 440 b.c.e and had the first idea about atoms.
Who is Democritus?
100
The experiment that found the nucleus of an atom.
What is the gold foil experiment?
100
This element "K".
Hint: 
What is Potassium?
100
The nucleus is made up of these subatomic particles.
What are protons and neutrons?
100
The definition of periodic.
What is things that happen at regular intervals?
200
J.J. Thompson's experiment resulted in the discovery of electrons.
What is the Cathode-Ray Tube experiment?
200
The experiment that founded the idea of the plum pudding model.
What is the cathode-Ray tube?
200
The top number on a periodic table card.
__________
| 6 |<-----
| Carbon |
| 12.0 |
___________
What is the Atomic number?
200
The average of the isotope mass.
What is atomic mass?
200
The man who discovered the atomic number.
Who is Henry Mosley?
300
The experiment that exposed the nucleus in atoms.
What is Ernest Rutherford's Gold-Foil experiment?
300
True or false
Dalton used experiments to make the first atomic theory.
What is true?
300
The elements found on the zig zag line of the periodic table.
What is non metals?
300
Keeps the nucleus together.
What is the strong force?
300
The way Mendeleev originally organized the periodic table.
What is the Atomic Mass?
400
The word atoms (Atomos) means.
What is "not able to be divided"?
400
Atomos means ________
What is not able to be divided?
400
The number below the element name.
What is mass number?
400
The subatomic particle in orbit of the nucleus.
What is the electron?
400
What is Medaleev's first name?
What is Dimitri?
500
Daily Double!
John Dalton's first atomic theory.
What is:
. All substances are made of atoms. atoms cannot be divided, created, or destroyed
. Atoms of the same element are exactly alike, and atoms of different elements are different
. Atoms join together with other atoms to make new substances
500
The cathode-ray tube experiment discovered this.
What is, "electrons have a negative charge?"
500
The letter or letters on top of the element.
What is a symbol?
500
The force that keeps the electron in orbit.
What is the magnetic force?
500
The two names of the horizontal and vertical columns.
What is a Group and period?