Unit 6 Quiz

Multiple Choice/ Short Answer ( 35 points )

Name _______________________

1.(10) a ) When a cation is formed from an atom, is the size of the cationlarger than, smaller than, or the same size as tthe atom from which it wasionized ? Briefly explain using potassium, K and the potassium cation, K(+1)as an example. Note: Include the electron configurations for both K andK(+1) using spectroscopic notation in your discussion.

b) Why do you expect the "chemistry" of ;the elements magnesiumand calcium to be similar ?

2. (10) What is the maximum number of electrons that could be"addressed" with the following quantum numbers ? If the "set" of numbers is not an allowed possibility, write, none.

	n	l	m(l)	m(s)	Maximum # of electrons
a)	4
b)	3	0	0
c)	2	1	-1	+1/2
d)	3	2
e)	2	2	-2	+1/2

3. (10) a) Give the "electron box" diagrams and the correspondingLewis Dot Symbols for the elements hydorgen, carbon, nitrogen and oxygen.

b) Using the electron dot symbols for nitrogen and hydrogen, draw theLewis electron pair bond structure for ammonia, NH(3).

c) State the "octet" rule.

d) Does the nitrogen atom in your ammonia structure satisfy the octetrule? What about the hydrogens ?

4. (5) i) Which of the following ions has the largest ionic radius?

a) F ( 1- )

b) O ( 2- )

c) Na ( 1+ )

d) N ( 3- )

ii) A measure of a atom to acquire an electron and become negativelycharged is called its

a) ionization energy	b) polarizability	c) electron affinity
d) electronegativity	e) electron density