Snapquiz - Isotopes

Question 1. How is a deuterium atom different from a hydrogen atom?

It has two extra protons.
It has two extra neutrons.
It has one extra proton.
It has one extra neutron.

Question 2. How is a tritium atom different from a hydrogen atom?

It has two extra neutrons.
It has two extra protons.
It has one extra proton.
It has one extra neutron.

Question 3. A chlorine atom contains 17 protons and 17 electrons. About 75% of chlorine atoms are the chlorine-35 isotope. How many neutrons does one of these atoms contain?

20.
18.
1.
17.

Question 4. How is a uranium-235 atom different from a uranium-238 atom?

It has three extra neutrons.
It has three less neutrons.
It has three less protons.
It has three extra protons.

Question 5. A chlorine atom contains 17 protons and 17 electrons. About 25% of chlorine atoms are the chlorine-37 isotope. How many neutrons does one of these atoms contain?

3.
18.
17.
20.

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