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 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 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?

18.
1.
20.
17.


Question 3. How are isotopes of an element similar to each other?

They have the same number of neutrons.
They have no similarities.
They have the same number of protons.
They have the same mass number.


Question 4. How would a glass of water made with hydrogen-2 atoms be different to a glass of water made with hydrogen-1 atoms?

It would be radioactive.
It would be slightly heavier.
It would have a different taste.
It would be a different colour.


Question 5. How are isotopes of an element different from each other?

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


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