Write the electron configurations for Write the electron configurations for As (33), Sb (51) As (33), Sb (51)

1s22s22p63s23p64s2

3d104p65s24d104p3 = Sb

1s22s22p63s23p64s2

3d104p3 = As

Write the outer electrons in the Write the outer electrons in the proper places in this chart.proper places in this chart.

HH HeHe HeHe

22

33

44

55

66

77

ns1 ns2….

2s1

3s1

4s1

1s1

5s1

6s1

7s1

2s2

3s2

4s2

5s2

6s2

7s2

3d1

3d2…

2p1…

4d1

5d1

6d1

Dot Dot DiagramsDiagrams

Lithium (3) and Lithium (3) and Beryllium (4)Beryllium (4)

1s 2s

Li = 3 Li

Be = 4 Be

http://www.pbs.org/wgbh/nova/kaboom/elemental/Periodic table and fireworks

1s 2s 2p

B= 5 B

C = 6 C

N = 7 N

O = 8 O

F = 9 F

Ne = 10 Ne

First EnergyLevel

2nd EnergyLevel

H

Li

Na

K

Rb

Cs

Fr

1s1

1s22s1

1s22s22p63s1

1s22s22p63s23p64s1

1s22s22p63s23p64s23d104p65s1

1s22s22p63s23p64s23d104p65s24d105p66s1

1s22s22p63s23p64s23d104p65s24d105p66s24f145d106p67s1

s1 one dot!

He

Be

Mg

Ca

Sr

Ba

Ra

1s2

1s22s2

1s22s22p63s2

1s22s22p63s23p64s2

1s22s22p63s23p64s23d104p65s2

1s22s22p63s23p64s23d104p65s24d105p66s24f145d106p66s2

1s22s22p63s23p64s23d104p65s24d105p66s24f145d106p6….7s2

s2 Two dots!

B

Al

Ga

In

Tl

s2p1 three dots

C

Si

Ge

Sn

Pb

s2p2 4 dots!

s2p3 5 dots!

O

S

Se

Te

Po

s2p4 6 dots

7 dots

8 dots

[Ar] indicates a short cut for theelectron configurationof argon.Ca = [Ar]4s2

E = hE = h = c / = c / E = hc/ E = hc/ E = E = (6.6 x 10(6.6 x 10-34-34Jsec)(3.0x10Jsec)(3.0x1088m/sec)m/sec)

nm (10nm (10-9-9m/nm)m/nm)

For violet light,400 nm, E =:1.9 x 10-16

1.9 x 10-16 400= 4.8 x 10-19 Joules

Exponents:-34 + 8 –(-9)= -34 +8 + 9

=-17

6.6 x 3 = 19.8

19.8 x 10-17

= 1.98 x 10-16

E = hE = h = c / = c / E = hc/ E = hc/

E = E = (6.6 x 10(6.6 x 10-34-34Jsec)(3.0x10Jsec)(3.0x1088m/sec)m/sec)

nm (10nm (10-9-9m/nm)m/nm)

For red light,700 nm, E =:1.9 x 10-16 1.9 x 10-16 700 = 2.7 x 10-19 Joules

Exponents:-34 + 8 –(-9)= -34 +8 + 9

=-17

6.6 x 3 = 19.8

You should now be able to You should now be able to complete the homework for this complete the homework for this

Chapter!Chapter!