Thursday

March 5, 2015

March 5, 2015

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

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.

- Chemistry -
**DrBob222**, Saturday, October 16, 2010 at 4:02pm1. 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.**Correct.**

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.**I don't know what 2-4 or 2-7 means. If it means 2 electrons in n = 1 and 4 in n = 2, then b is correct.**

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.**a is correct if that means 2 electrons in n = 1 and 7 in n = 2.**

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.**Correct**

- Chemistry -
**timmy123**, Saturday, October 16, 2010 at 4:19pmthanks

**Answer this Question**

**Related Questions**

Chemistry - What is the total number of principal energy levels or shells in an ...

chemistry - 1.what is meant by atomic number of an element? 2.the mass number of...

Chemistry - 24. A quantum is a finite amount of energy gained or lost by an atom...

chemistry - I wanted to check my True and False Chemistry HW. I am not 100% they...

Chemistry - An atom contains a total of 25 electrons. When the atom is in the ...

Chemistry - In the recent Chem Activities, we have been learning about how ...

Chemistry - What is the nuclear charge of an atom with a mass of 23 and an ...

Please Chemistry Help - for the transition of an electron in a hydrogen atom ...

CHEM Periodic Trends - Each of the statements below attempts to explain why some...

Science-Periodic Table - whats the connection/relationship between the # of ...