Glossary of CHEMISTRY CH. 5
Other Decks By This User
- How does atomic radius vary across a period? Down a family? Why?
- across period: decreases b/c of addition of protons
down family: increases b/c of addition of energy levels
- How does I.E. vary across a period? Down a family? Why?
- across period: increases b/c size decreases
Down family: decreases b/c size increases
- How does e- affinity vary across a period? Down a family?
- across: gets more neg.
down: gets less neg.
- How do boiling/melting points vary across a period? Down a family?
- across: increase from families 1-6 and decrease from 6-12
- How do you determine the largest/smallest atomic radius?
- closer to Fr the bigger, closer to He the smaller--NO EXCEPTIONS
- How do you determine the largest/smallest I.E.?
- closer to He the bigger, closer to Fr the smaller--watch out from families 2-13 & 15-16
- How do you determine the largest/smallest e- affinity?
- closer to He the bigger, closer to Fr the smaller--throw out families 2, 15,18
- How do you determine the highest/lowest boiling & melting points?
- closer to W(74) the higher they are
- How do you determine the most reactive metal or nonmetal?
- He: most reactive nonmetal
Fr: most reactive metal
- How do you determine what e- removed from an atom will result in a huge jump in I.E. and why?
- add 1 to the last digit of the family #
b/c you're going to the next lowest energy level
ex: Be: 3
- Which families have positive e- affinities & which ones have negative?
- positive: 2 & 18
negative: all the rest
- IONIZATION ENERGY
- the energy needed to remove the most loosely held e- of an atom in the gas phase
- ELECTRON AFFINITY
- the energy released or absorbed when we add an e- to a neutral atom (opp. of I.E.)
- ALKALI METALS
- Family 1
- ALKALINE METALS
- Family 2
- Family 17
- NOBLE GASES
- Family 18 (including He)
- TRANSITION ELEMENTS
- d sublevel elements (Fam. 3-12)
- elements/ions which have the same # of e-s
- For pos. and neg. e- affinities, is the neutral element or neg. ion more stable?
- Pos. < neutral element
Neg. > neutral element
ex: F- vs. F
Kr vs. Kr-
- Know what charge ions all of the families & transition elements will form & how to give e- configurations.
Mo: [Kr]5s^2 4d^4
*take e-s from valence shell
- Know how to identify an ion from its e- configuration.
- X3+ = [Ne]3s^2 3p^6
X3+ = 18e-
X = 21e-
X = Sc
- What determines the chemical properties of a neutral element or ion?
- valence e-s
- What do large (-) e- affinities mean?
- large (-) e- affinities = more exothermic = more energy released
You must Login or Register to add cards