Atomic History
He came up with the idea of an Atom
Democritus
the amount of significant figures in this equation...
2.80 x 10-3
3
The most abundant of the 3 isotopes is...
Mn-50, Mn-55, Mn-57
Mn-55
The solution of...
2.8pL into L
2.8 x 10-12 L
The equation used to find density...
m/v
He came up with the Atomic Theory
John Dalton
The amount of significant figures in this data...
0.0034 inches
2
The least common of the 3 isotopes of iron are...
Fe-52, Fe-53, Fe-56
Fe-52
The solution of...
0.004 km into cm
400cm
The density of carbon monoxide gas if 0.196g occupies 150mL
0.196/150 = 0.0013g/mL
He discovered the neutron
James Chadwick
The amount of sig figs in this data...
40. mL
The average atomic mass of these elements equals...
59.2% of Z-11 and 40.8% of Z-14
12.22amu
The solution of...
22.4cL into µL
224,000µL
the volume of a tank that can hold 21.0g of hexane with a density of 0.823g/cm3
.823 = 21.0g/v
v = 25.53cm3
The experiment that led to the discovery of the electron
Cathode Ray Tube
The solution to...
0.57 + 1.990 + 2.9 =
5.5
The average atomic mass between the two equations are...
63.1% of X-40 and 36.9% of x-41
40.37amu
The solution of...
2.5 x 10-3 mg/cL into g/cL
2.5x10-6 g/cL
The volume is greater in which shape. The block's density is 4.2g/cm3. The sphere's density is 1.2g/cm3. They share the same mass of 4g
This experiment changed the view of the atom. Went from plum pudding to a dense nucleus
Gold Foil
The solution to...
(8.13 x 104) / (3.8 x 102) =
210
20.2% of X-20; 40.2% of X-21; 39.6% of X-25
22.4amu
The conversion of...
5.90 x 10-7 =
0.000000590
6 zeros
The volume of a block of silver that has a density of 10.5g/cm3 and weighs 4.2kg
400. cm3