Last modified: Sun 01/17/2016 07:00:22 pm
BCE

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Answer all of the questions below. If you do not know an answer enter CNA. However, it will help me the most if you answer each question with your best intuition/idea about what would be a reasonable answer.


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1. Complete the table below for the elements in the left most column;

Element

# of protons

# of electrons in outer most shell (valence electrons)

# of inner core electrons (inner shell(s))

# of electrons between the nucleus and the outer most electrons

Li

Be

B

C

 

2. How do the number of protons change (increase, decrease, no change) as one moves from lithium to carbon?

3. How do the number of inner core electrons change (increase, decrease, no change) as one moves from lithium to carbon?

4. How do the number of outer most electrons change (increase, decrease, no change) as one moves from lithium to carbon?

5. In terms of Q2 - Q4 how do you explain the following statement. Use as many of the following terms as you can in your explanation: valence electrons, inner core electrons, shielding electrons.

The outer electrons in carbon only feel an attractions to the nucleus of a +4 charge.

6. What do you think happens to the radius of the of the atoms; Li, Be, B and C as one moves from left to right across the periodic table?

Increase, decrease or remain constant?

Explain.

7. Write the complete electron configuration for each of the elements below; (for example 1s^2 2s^2 2p^6.....)

a) Li

b) Be

c) B

d) C

8. Is there anything about the questions that you feel you do not understand? List your concerns/questions.

9. If there is one question you would like to have answered in lecture, what would that question be?