Saturday
August 23, 2014

Homework Help: Chemistry

Posted by timmy123 on Saturday, October 16, 2010 at 3:47pm.

Did I answer these correctly?

1. What is the total number of principal energy levels or shells in an atom with an atomic number of 30?

a. 3
b. 4
c. 5
d. 6

I choose b.

2. The electron configuration of an atom in the ground state is 2-4. The total number of occupied principal energy levels in this atom is

a. 1
b. 2
c. 3
d. 4

I choose b.

3. In an atom that has an electron configuration of 2-7, what is the total number of electrons in its principal energy level of highest energy?

a. 2
b. 5
c. 6
d. 7

I choose a.

21. What is the total number of occupied principal energy levels in an atom of 11Na?

a. 1
b. 2
c. 3
d. 4

I choose c.

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