Structure stuff

Question 1

Shielding

Answer 1

blocks an electrons ability to detect full positive charge in the nucleus

Question 2

Zeff

Answer 2

Effective Nuclear Charge; the charge an electron actually feels because of shielding

Question 3

Ionic Radius

Answer 3

How a radius changes when a cation forms

Question 4

Ionization Energy (creation of cations)

Answer 4

energy required to remove an electron from the valence shell

Question 5

Periodic Trends for Ionization Energy

Answer 5

Down a group: decreases

Across a group: increases

Question 6

Electronic Energy (creation of anions)

Answer 6

Energy needed to add electrons to the valence shell

Question 7

Electronic Affinity

Answer 7

energy change as a result of adding an electron to a gaseous atom

3rd EA is ALWAYS positive

Question 8

Electro-negativity

Answer 8

a measure of attraction of an atom for bonding electrons in molecules

Question 9

Periodic Trend of Electronegativity

Answer 9

Across a period: increases

Down a group: decreases

Question 10

Purpose of Using Electronegativity

Question 11

Lewis Dot Structure Rules

Question 12

Zeff Periodic Trends

Answer 12

Down a group: no effect

Across a period:increases