Atom History
Came up with the plum pudding model
Thomson
The subatomic particle that is positively charged and found in the nucleus
Protons
Convert 5.2 cm to mm
52 mm
Write the following in standard form
5 x 104
50000
How many sig figs does the following number have?
25
2
The first person to think about atoms. He said atoms were solid, homogeneous, indestructible, and invisible.
Democritus
The subatomic particle that is neutral and is in the nucleus.
Convert 2.5km to Dm
250
Write the following in scientific notation
4004 x 102
How many sig figs does the following number have?
30060
4
Said that atoms could not move through space because he didn't believe it. Caused a 2000 year pause on the research of atoms.
Aristotle
6
Convert 0.004kg to cg
0.04cg
Write the following in standard form
5.3 x 10-4
How many sig figs does the following number have?
30060.0
6
He conducted experiments to prove or disproved Democritus's work
Dalton
What is the mass number of Oxygen
15.99 or 16
Convert 5mL to L
0.005 L
Write the following in scientific notation
0.00454.5x 10-3
How many sig figs does the following number have?
00008
1
Did the gold foil experiment and found that there was a nucleus
Rutherford
How many protons, neutron, and electrons are in Titanium
protons = 22
neutrons = 26
electrons = 22
Convert 0.06cm to Hm
0.000006
Write the following in scientific notation
453400
4.534 x 105 or 4.5 x 105
How many sig figs does the following number have?
0.0045060
5