Snapquiz - Electron Structure

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


Question 1. A calcium atom has an atomic number of 20 and a mass number of 40. How many electron shells does it have?

4.
2.
1.
3.


Question 2. A potassium atom has a mass number of 39 and an atomic number of 19. How many electrons does it have?

39.
48.
19.
20.


Question 3. A chlorine atom has a mass number of 35 and an atomic number of 17. How many electrons does it have?

52.
17.
35.
18.


Question 4. A lithium atom has a proton number of 3 and a mass number of 7. How many electrons does it have?

3.
4.
7.
10.


Question 5. A hydrogen atom has a mass number of 1 and a proton number of 1. How many electrons are in its outer shell?

1.
4.
2.
0.


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