Periodic Trends

Question 1

Properties of Metals

Answer 1

Malleable
Lustrous
Good conductors of electricity and heat
Form basic oxides
Lose electrons to form cations
Usually solid at room temperature
High melting/BP

Question 2

Properties of Non-Metals

Answer 2

Brittle
Dull
Poor conductors of electricity and heat
Form acidic oxides
Gain electrons to form anions
Gas/solid at room temperature
Low MP/BP

Question 3

Atomic Radius

Answer 3

Decreases across period

Increases down group

Question 4

Effective Nuclear Charge

Answer 4

Positive charge an electron experiences

Shielding effect of electrons decreases attraction between nucleus and valence electrons

Increases across period (more H+, same number of orbitals)

Decreases down group (more H+. but also more electrons)

Question 5

Ionization Energy

Answer 5

Energy needed to remove an electron

Increases across period

Decreases down group

Question 6

Ionization Energy Exceptions

Answer 6

Alkaline Earth Metals have full orbital-have greater ionization energy than Group 13

Group 15 has half filled orbiatls, more stable than group 16

Question 7

Electron Affinity

Answer 7

Energy released when electron removed (how much atom wants to hold on to the electron)

Increases across period

Decreases down groups

Question 8

EN

Answer 8

Ability of an atom to attract an electron to form a bond

Increases across period

Decreases down group