Snapquiz - Isotopes

This is the Snapquiz on Isotopes. Click here or use the embedded video if you haven't watched the lesson yet.

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

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

Question 2. How are isotopes of an element different from each other?

They have different numbers of electrons.
They have different numbers of neutrons.
They have different numbers of protons.
They have different atomic numbers.

Question 3. How is a uranium-235 atom different from a uranium-238 atom?

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

Question 4. 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?


Question 5. Which number tells us which isotope we are dealing with?

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

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