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

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


Question 2. How is a deuterium atom different from a hydrogen atom?

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


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.
20.
18.
17.


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?

3.
18.
17.
20.


Question 5. How is a carbon-14 atom different from a normal carbon-12 atom?

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


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