Snapquiz - Isotopes

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

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

Question 2. 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.
17.
1.
18.

Question 3. 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?

18.
17.
3.
20.

Question 4. Which number tells us which isotope we are dealing with?

The proton number.
The electron number.
The atomic number.
The mass number.

Question 5. How is a deuterium atom different from a hydrogen atom?

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

If you would like to track your scores, please enter your preferred first name into the box (please note, this uses cookies to store the data on your computer/phone/tablet - please see the FAQ for more information). Alternatively, if your teacher has given you a code starting with a # symbol, you can enter that: