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
Is Density an Intrinsic or Extrinsic property
Intrinsic
He came up with the Atomic Theory
John Dalton
The amount of significant figures in this data...
34012 skittles
Unlimited
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
12.2amu
The solution of...
22.4cL into µL
224,000µL
The volume is greater in this shape:
The block's density is 4.2g/cm3.
The sphere's density is 1.2g/cm3.
They share the same mass of 4g
Sphere
The experiment that led to the discovery of the electron
Cathode Ray Tube
The solution to...
110.6 + 1.990 + 20 =
133
(no decimals and 132.59 rounds up)
The average atomic mass between the two equations are...
63.1% of X-40 and 36.9% of x-41
40.4amu
The solution of...
2.5 x 10-3 mg/L2 into mg/cL2
2.5x10-7 mg/cL2
What is the volume of a container that can hold 21.0g of hexane with a density of 0.823g/cm3
.823 = 21.0g/v
v = 25.5cm3
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 Gg/mL= _________ kg/L
590.
(3 sig figs)
The volume of a block of silver that has a density of 10.5g/cm3 and weighs 4.20kg
400. cm3
(3 sig figs)