Lecture 11: Periodic Trends

Question 1

Atom size definition

Answer 1

½ the distance between nuclei of two atoms of the
element in the solid phase (use X-ray crystallography!)

Question 2

size (increase direction)

Answer 2

up and right> /

Question 3

ionization energy (increase direction)

Answer 3

down and left < /

Question 4

electron affinity (increase direction)

Answer 4

down and left< /

Question 5

energy of an electron is a balance of

Answer 5

-electrostatic attraction
-electrostatic repulsion
-distance

Question 6

Z is

Answer 6

nuclear charge

Question 7

Z effective is

Answer 7

portion of Z that the e- actually experience

Question 8

Zeff is different for every atom & subshell due to

Answer 8

shielding & penetration

Question 9

Zeff influences

Answer 9

how strongly valence electrons are held

Question 10

ionization energy

Answer 10

Amount of energy required to remove an electron

Question 11

electron affinity

Answer 11

Energy change that occurs when a neutral atom gains an e- to form an anion

Question 12

cations are

Answer 12

smaller than neutral atoms

Question 13

anions are

Answer 13

larger than neutral atoms

Question 14

isoelectronic

Answer 14

EXACT same electron configuration but with a different amount of protons