Atoms, The Nucleus And The Mole
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Chemistry students, assemble! Today we’ll be having a look at a number of different topics under the overall study of nuclear chemistry, including atoms, the nucleus and the mole. Do you have a firm enough grip on each of these topics? Take this quiz and find out!
- 1.Which of the following has an odd number of both protons and neutrons?
- A.
Helium-4
- B.
Lithium-7
- C.
Boron-10
- D.
Carbon-13
- 2.If you have 5g each of Li, Na, K, and Rb, for which element will you have the largest number of moles?
- A.
Lithium
- B.
Sodium
- C.
Potassium
- D.
Rubidium
- 3.If you have three times the mass of carbon as you have helium, which of the following is true?
- A.
You have nearly equal numbers of carbon atoms as helium atoms.
- B.
You have more atoms of carbon.
- C.
You have more atoms of helium.
- D.
You cannot know a relationship between carbon atoms and helium atoms.
- 4.In positron emission, what is the resulting change in the nucleus?
- A.
Atomic number increases by 1.
- B.
Atomic number decreases by 1.
- C.
Atomic number decreases by 2.
- D.
Atomic number stays the same.
- 5.Who discovered the charge to mass ratio for electrons?
- A.
J.J. Thomson
- B.
Ernest Rutherford
- C.
John Dalton
- D.
Robert Millikan
- 6.Which of the following pairs of compounds could be used to explain the law of multiple proportions?
- A.
H2O and H2O2
- B.
CH4 and CO2
- C.
NaCl and KCl
- D.
SO3 and H2S
- 7.What experiment resulted to the discovery of the nucleus?
- A.
Gold foil (or alpha scattering) experiment
- B.
Cathode ray tubes
- C.
Oil drop experiment
- D.
Mass spectroscopy
- 8.How many electrons are in a magnesium-24 with a charge of 2+?
- A.
10
- B.
12
- C.
14
- D.
22
- 9.How are ions formed?
- A.
By gaining or losing electrons
- B.
By gaining or losing protons
- C.
By beta decay
- D.
By positron emission
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