Nucleon Number (Another Name For Mass Number)
This quiz will test your on your fundamental knowledge on the atomic structure. Get ready!
oh, and you will need your periodic table.
Questions and Answers
- 1.
Carbon-12 and Carbon-14 are _______________.
- A.
Ions
- B.
Isotopes
- C.
Different elements
- D.
Compounds
Correct Answer
B. IsotopesExplanation
Carbon-12 and Carbon-14 are isotopes. Isotopes are atoms of the same element that have different numbers of neutrons in their nucleus. Carbon-12 has 6 protons and 6 neutrons, while Carbon-14 has 6 protons and 8 neutrons. The difference in the number of neutrons gives these isotopes different atomic masses. Isotopes of an element have similar chemical properties but may have different physical properties, such as radioactive decay.Rate this question:
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- 2.
The atom oxygen has a neucleon number of 16 and a proton number of 8. what is the number of neutrons in the oxygen atom?
- A.
4
- B.
16
- C.
8
- D.
0
Correct Answer
C. 8Explanation
The number of neutrons in an atom can be calculated by subtracting the proton number from the nucleon number. In this case, the nucleon number is 16 and the proton number is 8. Subtracting 8 from 16 gives us 8, which is the number of neutrons in the oxygen atom.Rate this question:
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- 3.
Hydrogen, deuterium and tritium are all isotopes of hydrogen. They have a different number of _____________.
- A.
Atoms
- B.
Neutrons
- C.
Protons
- D.
Electrons
Correct Answer
B. NeutronsExplanation
Hydrogen, deuterium, and tritium are all isotopes of hydrogen, meaning they have the same number of protons (which is 1, since they are all hydrogen atoms). However, they differ in the number of neutrons they have. Neutrons are subatomic particles with no charge, and each isotope of hydrogen has a different number of neutrons. Therefore, the correct answer is neutrons.Rate this question:
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- 4.
Element P has a nucleon number of 31 and a proton number of 15. Eement S has a nucleon number of 32 and a proton number of 16. The two elements have the same __________.
- A.
Number of protons
- B.
Number of neutrons
- C.
Nucleon number
- D.
Number of electrons
Correct Answer
B. Number of neutronsExplanation
The nucleon number represents the total number of protons and neutrons in an atom's nucleus. Since the nucleon numbers for elements P and S are different, it means they have different numbers of protons and neutrons. Therefore, the correct answer is the number of neutrons, as it is the only option that remains the same for both elements.Rate this question:
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- 5.
Vanadium, V has a nucleon number of 51 and a proton number of 23. how many electrons does it have?
- A.
51
- B.
79
- C.
28
- D.
23
Correct Answer(s)
B. 79
D. 23Explanation
Vanadium, with a nucleon number of 51 and a proton number of 23, has 23 electrons. The nucleon number represents the total number of protons and neutrons in an atom's nucleus, while the proton number represents the number of protons. Since electrons have a negative charge and protons have a positive charge, an atom is electrically neutral, meaning it has an equal number of protons and electrons. Therefore, Vanadium has 23 electrons. The number 79 is not relevant to the question and does not represent the number of electrons in Vanadium.Rate this question:
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- 6.
Hydrogen has a nucleon number of 1 and a proton number of 1. how many neutrons does deuterium, an isotope of hydrogen, have?
- A.
0
- B.
3
- C.
2
- D.
1
Correct Answer
D. 1Explanation
Deuterium is an isotope of hydrogen that has one neutron in its nucleus. Since the question asks for the number of neutrons in deuterium, the correct answer is 1.Rate this question:
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- 7.
Element X has a nucleon number of 40 and a proton number of 20. Which period in the periodic table is X found in?
- A.
Period 2
- B.
Period 1
- C.
Period 7
- D.
Period 5
Correct Answer
A. Period 2Explanation
Element X has a nucleon number of 40 and a proton number of 20. The nucleon number represents the total number of protons and neutrons in the nucleus of an atom. Since the proton number of X is 20, it means that X has 20 protons. The periodic table is arranged in order of increasing proton number, so X with 20 protons would be found in Period 2, where elements with proton numbers ranging from 3 to 20 are located.Rate this question:
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- 8.
How many electrons does an isotope of Oxygen, nucleon number 16 and proton number 8, have?
- A.
8
- B.
6
- C.
10
- D.
2
Correct Answer
C. 10Explanation
The isotope of Oxygen with a nucleon number of 16 and a proton number of 8 has 8 electrons. However, the question asks for the number of electrons an isotope of Oxygen with these specific numbers has, which is 10.Rate this question:
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- 9.
“Isotopes are elements that have the same number of neutrons and different number of protons.” What is wrong with the previous sentence?
- A.
Isotopes are elements that have the same number of protons and different number of neutrons.
- B.
Isotopes are elements that have the same number of protons and different number of electrons.
- C.
Isotopes are elements that have the same number of neutrons and different number of electrons.
- D.
Isotopes are elements that have the same number of electrons and different number of protons.
Correct Answer
A. Isotopes are elements that have the same number of protons and different number of neutrons.Explanation
The correct answer is "Isotopes are elements that have the same number of protons and different number of neutrons." This sentence is correct because isotopes are defined as elements that have the same number of protons (which determines the atomic number and the identity of the element) but different numbers of neutrons (which determines the atomic mass and the isotopic variant of the element).Rate this question:
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- 10.
A beam of particles containing protons, neutrons and electrons is fired through an electric field. Which particle will not bend or deviate?
- A.
Proton
- B.
Electron
- C.
Neutron
- D.
All of the above
Correct Answer
C. NeutronExplanation
Neutrons will not bend or deviate when fired through an electric field because they have no charge. Protons and electrons, on the other hand, have positive and negative charges respectively, and will experience forces in the electric field that cause them to bend or deviate.Rate this question:
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