Name The Scientist
(5) In 1911 this Scientist created the Rutherford's nuclear model
(First and Last name)
Who is Ernest Rutherford
(2) What did he discover:
Robert Millikan
-1911 he published the oil-drop experiment
His Oil-drop experiment included putting tiny oil droplets between two metal plates, some of the droplets picked up extra electrons. He kept messing with the plates and droplets until the droplets were suspended in mid air, he measured the electric field holding them in place to find the charge of each droplet.
What is the exact charge of an electron
(1.602 x 10^-19 coulombs)
Fill in the blank:
Published by Max Planck in 1900, Max discovered that:
“A [...?] is the smallest discrete unit (such as a particle) of a natural phenomenon in a system where the units are in a bound state.”
What is quanta
What atom model is still true today?
What is the quantum mechanical model
(1) Who is this scientist:
He published his results from the cathode ray experiments in 1897
Some of his experiments were:
-Cathode Ray experiments: He used cathode ray tubes to generate cathode rays. He saw that the rays are deflected by electric and magnetic fields, showing that they carry a negative charge. He concluded that there are streams of little negatively charged particles in all matter.
- Early mass spectrograph: used deflection paths to separate ion masses
-Experiments of Canal Rays and Isotopes: 1912 he sent a ionized neon through electric fields, the beam indeed up splitting, which means that neon contained two different masses
He was also responsible for discovering the electron and creating the plum pudding model
Who is JJ Thompson
What did James Chadwick discover?
What is a neutron
(3) A scientist by the name of Democritus created a term meaning "indivisible"
What is Atamos
(4) What is the name of the model created by Niels Bohr
What is the planetary model
or
What is Bohr's model
Name the scientist:
In 1804 this scientist created this atomic theory:
-All matter is composed of extremely small particles called atoms.
-Atoms of a given element are identical in size, mass, and other properties.
-Atoms of different elements differ in size, mass, and other properties.
-Atoms cannot be subdivided, created, or destroyed.
-Atoms of different elements can combine in simple whole number ratios to form chemical compounds.
-In chemical reactions, atoms are combined, separated, or rearranged.
Who is John Dalton
(6) In a Gold foil experiment, scientist Rutherford shot alpha particles in gold foil. Seeing that some hit the foil and bounced back, meanwhile others went straight through
What two things were discovered through the process of this experiment?
Electrons orbit the nucleus, with vast empty space between them and the nucleus,
The atom has a small, dense, positively charged nucleus at its center
In [year...?] James Chadwick used polonium-210 to emit alpha particles, which ended up bombarding beryllium
When was 1932
In 1913 what models did Bohr use to explain atomic stability?
What is Rutherford’s nuclear model
What is Planck’s quantum theory
While these concepts from Dalton are still true today: Atoms of different elements differ in size, mass, and other properties, Atoms of different elements can combine in simple whole number ratios to form chemical compounds
What are some that were proven wrong?
1. Atoms can further be subdivided into subatomic particles
2. all atoms of an element are not identical in mass meaning that the elements can vary in the amount of neutrons they contain
3. using nuclear fission and fusion techniques, we can create or destroy atoms by changing them into other atoms therefore expanding and proving Dalton’s theory wrong