1. How many naturally occurring isotopes of hydrogen are commonly known?
A.
One
B.
Two
C.
Three
D.
Four
Correct Answer:
Three
Explanation:
Hydrogen has three commonly known naturally occurring isotopes: protium, deuterium, and tritium.
2. What is the common name of the hydrogen isotope with no neutron?
A.
Deuterium
B.
Tritium
C.
Protium
D.
Hydronium
Correct Answer:
Protium
Explanation:
Protium is the hydrogen isotope containing one proton and no neutron.
3. Which hydrogen isotope contains one proton and one neutron?
A.
Protium
B.
Deuterium
C.
Tritium
D.
Hydrogen-1
Correct Answer:
Deuterium
Explanation:
Deuterium, or hydrogen-2, has one proton and one neutron in its nucleus.
4. Which isotope of hydrogen is radioactive?
A.
Protium
B.
Deuterium
C.
Tritium
D.
Hydrogen-1
Correct Answer:
Tritium
Explanation:
Tritium, or hydrogen-3, is a radioactive isotope of hydrogen.
5. What is the mass number of deuterium?
A.
1
B.
2
C.
3
D.
4
Correct Answer:
2
Explanation:
Deuterium has one proton and one neutron, so its mass number is 2.
6. What is the mass number of tritium?
A.
1
B.
2
C.
3
D.
4
Correct Answer:
3
Explanation:
Tritium contains one proton and two neutrons, giving it a mass number of 3.
7. What is the atomic number of all hydrogen isotopes?
A.
1
B.
2
C.
3
D.
0
Correct Answer:
1
Explanation:
All hydrogen isotopes have one proton, so each has atomic number 1.
8. Which pair represents two isotopes of hydrogen?
A.
Protium and deuterium
B.
Helium and deuterium
C.
Protium and helium
D.
Oxygen and tritium
Correct Answer:
Protium and deuterium
Explanation:
Protium and deuterium are isotopes of the same element because both have one proton but different numbers of neutrons.
9. Which hydrogen isotope is also called hydrogen-1?
A.
Protium
B.
Deuterium
C.
Tritium
D.
Hydrogen-3
Correct Answer:
Protium
Explanation:
Protium is hydrogen-1 because its nucleus contains one proton and no neutrons.
10. How many neutrons are present in a tritium atom?
A.
Zero
B.
One
C.
Two
D.
Three
Correct Answer:
Two
Explanation:
Tritium has mass number 3 and one proton, so it contains two neutrons.
Short questions are currently unavailable for this page.