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 carbon-14 atom different from a normal carbon-12 atom?

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


Question 2. Which number tells us which isotope we are dealing with?

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


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?

1.
18.
17.
20.


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?

17.
18.
20.
3.


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 numbers of neutrons.
They have different atomic numbers.


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