10. The following graph shows the gas speed distributions for four different gases, all at the sametemperature. Which of the curves is for the lightest gas?

�(nl)

11. What is the energy, in joules, (A, in m) of a radio station onerating at a frequency of 99.6 MHz?Hz= l/s

.. 61 -i} . / /l)I,, � 1 q<1, � ¥ti[i /4, 4 ZLa X JI) U 7 � � , r �__:.---�

-2.�}

� 1,1 l I b 4, 4.?DX2�

� --�� ){ lLl J-:e. --=-�-.:--:���-r'-��------K � -2� -�

l,,5} X/4 llA 12. Which combination of quantum numbers is possible for an atom with five orbitals in one

subshell? a. n = l, -C = 0 b. n = 2, -e = 4

G) n = 3,C=2

d. e.

n = 4,-e = 4 n = 5, -C = 0

13. Which of the following is the g�d-state electron configuration of the Mg2+ ion?a. ls22s22p63s2 L_V [He]2s22p6

b. [Ne]3s2 e. [He]2s22p8

c. [Ne]3s23p2

14. Which arrangement is in the correct order of decreasing radii?{i) As3

-> Br -> K+ d. Be> Ba+> 02-

6. p-> Mg+ > Cs e. Lt> Na+> K+

C. Na+> cs+> 1-

15. Arrange the following elements in order of increasing first ionization energy:3Li, 9f, 12Mg, 1sP, 11Cl.

16. Which of the following is most likely a polar covalent bond?a. Na-CI d. K-Fb. H-H e. Ca-0

(9 C-N

Mg<P<Cl<Li<F