# Atoms: Question Preview (ID: 4518)

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What is the mass of a proton or a neutron?
a) 1 atomic mass unit
b) 2 atomic mass units
c) 1 gram
d) almost zero

Which of the following are nucleons?
a) protons only
b) protons and neutrons
c) neutrons only
d) protons and electrons

Which subatomic particle acts as a stable force for the nucleus?
a) protons
b) alpha particles
c) electrons
d) neutrons

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) atoms have electrons
d) electrons are in orbitals

In Rutherford's experiment, some of the alpha particles were deflected because...
a) atoms have a nucleus
b) atom are mostly empty space
c) atoms have electrons
d) electrons are in orbitals

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) 18g
c) 30g
d) 42g

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) 54g
c) 70g
d) 124g

The Law of Constant Composition tells us that if the formula for ammonia is NH3, the ratio is
a) 1 N:3H
b) 3N:1H
c) 3N:3H
d) 1N:1H

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) 6C :12H: 1O
b) 1C : 2H :1O
c) 12C:6H:18O
d) 6C:6H:12O

The modern wave mechanical model of the atom tells us that electrons are located in
a) orbitals which are fixed paths
b) orbits which are fixed paths
c) orbitals which are areas of high probability
d) orbits which are fixed paths

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