Question 1

Which of the following statements correctly describes the difference between the isotopes of hydrogen: protium, deuterium, and tritium?

Accepted Answer

They have different numbers of neutrons.

Question 2

Which isotope of hydrogen is radioactive?

Accepted Answer

Tritium

Question 3

What is the chemical formula for heavy water?

Accepted Answer

$$\mathrm{D_2O}$$

Question 4

Which of the following best explains why the boiling point of heavy water ($$\mathrm{D_2O}) is $$higher than that of regular water ($$\mathrm{H_2O}$$)?

Accepted Answer

Deuterium forms stronger hydrogen bonds than protium.

Question 5

Which statement is true regarding the abundance of hydrogen isotopes in nature?

Accepted Answer

Protium is the most abundant isotope.

Question 6

A sample of water contains 2 deuterium atoms and 1 oxygen atom. What is the chemical formula of this sample?

Accepted Answer

$$\mathrm{D_2O}$$

Question 7

Which of the following is NOT a correct statement about tritium?

Accepted Answer

It is the most abundant hydrogen isotope.

Question 8

Which isotope of hydrogen has no neutrons?

Accepted Answer

Protium

Question 9

If a scientist wants to study radioactive decay in hydrogen, which isotope should they use?

Accepted Answer

Tritium

Question 10

Which of the following best describes the composition of regular water?

Accepted Answer

Composed of 2 protium atoms and 1 oxygen atom

Question 11

Which of the following is a correct statement about the electron configuration of hydrogen isotopes?

Accepted Answer

All hydrogen isotopes have the same electron configuration.

Question 12

Which isotope of hydrogen is used in nuclear fusion reactions in experimental reactors?

Accepted Answer

Deuterium

Question 13

Which of the following statements is true about the mass of deuterium compared to protium?

Accepted Answer

Deuterium has twice the mass of protium.

Question 14

Which of the following is a correct explanation for why tritium is less stable than the other hydrogen isotopes?

Accepted Answer

Tritium has an unstable neutron-to-proton ratio.

Question 15

Which of the following is a correct statement about the chemical properties of hydrogen isotopes?

Accepted Answer

They have nearly identical chemical properties.

Hydrogen Isotopes: Properties and Applications

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