Snapquiz - Electron Structure

Question 1. What is the maximum number of electrons which can fit in the first three orbits/shells respectively?

2,4,8.
4,6,8.
2,8,8.
8,8,8.

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

19.
20.
39.
48.

Question 3. A hydrogen atom has a mass number of 1 and a proton number of 1. How many electrons are in its outer shell?

0.
2.
4.
1.

Question 4. A carbon atom has a mass number of 12 and a proton number of 6. How many electrons are in its outer shell?

2.
12.
4.
6.

Question 5. A lithium atom has a proton number of 3 and a mass number of 7. How many electrons does it have?

3.
4.
10.
7.

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