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Atoms
Test Description: Answer the questions
Instructions: Answer all questions to get your test result.
1) What is the mass of a proton or a neutron?
A
2 atomic mass units
B
1 gram
C
1 atomic mass unit
D
almost zero
2) Which of the following are nucleons?
A
protons and neutrons
B
protons and electrons
C
protons only
D
neutrons only
3) Which subatomic particle acts as a stable force for the nucleus?
A
protons
B
alpha particles
C
neutrons
D
electrons
4) In Rutherford's experiment, most of the alpha particles went through the gold foil undeflected because...
A
atoms have a nucleus
B
atom are mostly empty space
C
electrons are in orbitals
D
atoms have electrons
5) In Rutherford's experiment, some of the alpha particles were deflected because...
A
electrons are in orbitals
B
atom are mostly empty space
C
atoms have electrons
D
atoms have a nucleus
6) The Law of Conservation of Mass helps us understand that if 12 g Hydrogen and 18 grams Oxygen react then the product will have a mass of
A
30g
B
18g
C
42g
D
12g
7) The Law of Conservation of Mass helps us understand that if 54 Hydrogen and ? grams Oxygen react and the product is 70g. Then the oxygen had to have been.. mass of
A
124g
B
54g
C
70g
D
16g
8) The Law of Constant Composition tells us that if the formula for ammonia is NH3, the ratio is
A
3N:1H
B
1 N:3H
C
1N:1H
D
3N:3H
9) The Law of Constant Composition tells us that if the formula for glucose is C6H12O6, the ratio is (hint- put into lowest ratios, simplify!)
A
12C:6H:18O
B
6C :12H: 1O
C
6C:6H:12O
D
1C : 2H :1O
10) The modern wave mechanical model of the atom tells us that electrons are located in
A
orbits which are fixed paths
B
orbits which are fixed paths
C
orbitals which are fixed paths
D
orbitals which are areas of high probability
*select an answer for all questions
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