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 phosphorus atom has a mass number of 30 and a proton number of 15. How many electron shells does it have?

3.
1.
2.
4.


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

19.
39.
48.
20.


Question 3. An argon atom has a proton number of 18 and a mass number of 40. How many electrons are in its outer shell?

40.
8.
18.
22.


Question 4. A hydrogen atom has a mass number of 1 and a proton number of 1. How many electrons are in its outer shell?

2.
1.
0.
4.


Question 5. A calcium atom has an atomic number of 20 and a mass number of 40. How many electron shells does it have?

4.
3.
2.
1.


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