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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
almost zero
B
1 atomic mass unit
C
2 atomic mass units
D
1 gram
2) Which of the following are nucleons?
A
protons and neutrons
B
neutrons only
C
protons only
D
protons and electrons
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
electrons are in orbitals
C
atom are mostly empty space
D
atoms have electrons
5) In Rutherford's experiment, some of the alpha particles were deflected because...
A
electrons are in orbitals
B
atoms have a nucleus
C
atom are mostly empty space
D
atoms have electrons
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
12g
B
42g
C
18g
D
30g
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
16g
B
124g
C
54g
D
70g
8) The Law of Constant Composition tells us that if the formula for ammonia is NH3, the ratio is
A
3N:1H
B
1N:1H
C
1 N:3H
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:6H:12O
C
1C : 2H :1O
D
6C :12H: 1O
10) The modern wave mechanical model of the atom tells us that electrons are located in
A
orbitals which are fixed paths
B
orbitals which are areas of high probability
C
orbits which are fixed paths
D
orbits which are fixed paths
*select an answer for all questions
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