PLEASE HELP SOON!!
Answer as many as you want/can but please put the question number beside the answer :)


1.) Most of the volume of an atom is occupied by the
a. nucleus.
b. nuclides.
c. electron cloud.
d. protons.

2.) Ag-109 has 62 neutrons. The neutral atom has
a. 40 electrons.
b. 47 electrons.
c. 53 electrons.
d. 62 electrons.

3.) What is the maximum number of electrons in the second principal energy level?
a. 2
b. 8
c. 18
d. 32

4.) For n = 4, the number of possible orbital shapes is
a. 1.
b. 4.
c. 16.
d. 32.

5.) According to the aufbau principle, ____.
a. an orbital may be occupied by only two electrons
b. electrons in the same orbital must have opposite spins
c. electrons enter orbitals of highest energy first
d. electrons enter orbitals of lowest energy first

6.) The major difference between a 1s orbital and a 2s orbital is that
a. the 2s orbital can hold more electrons.
b. the 2s orbital has a slightly different shape.
c. the 2s orbital is at a higher energy level.
d. the 1s orbital can have only one electron.