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


Question 2. How are isotopes of an element similar to each other?

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


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?

17.
1.
20.
18.


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

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


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?

18.
17.
3.
20.


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