df

Question 1

df ENC

Answer 1

effective nuclear charge- + charge experienced by e-

Question 2

df NC

Answer 2

nuclear charge- attraction of e- from nucleus

Question 3

df shielding

Answer 3

where e- shells nearer nucleus reduce attractive force bn outer shell e- a nucleus

Question 4

why ionization en of O< of N

Answer 4

in 2P orbital: O has 2,1,1 a N has 1,1,1

ec to remove 1 e- from pair of e- as they repel e otr

Question 5

why 2nd IE require more en than 1st

Answer 5

(Ionization en)

ion more + so more strongly attracts remaining e-

Question 6

how use successive IE table 2 work out gp num

Answer 6

when remove e- from lower e- shell, huge jump in en required

count how many e- removed b4 happens eg 590,1100-,-4400 means gp 2 eg Ca

Question 7

flame col 8 eles

Answer 7

BaCK-GamBLe Bar=apple green, Cae=Blue, K=lilac
Mg=None
red= Ca Li Rub Str= CoLoRS (ca= brick red, Li=scarlet r)

Question 8

fma ion travel tm in mass spectrometry

Answer 8

dist* root(mass) // 2K E

Question 9

df en 2 bk bond

Answer 9

dissociation

Question 10

df bk bond, give 1 e- 2 e atom

Answer 10

homolysis

Question 11

df where ele both oxidzed a reduce

Answer 11

disporoportionation eg CL2 (1 Cl ox, otr red

Question 12

nm 4 type crystall stt

Answer 12

ionic, metallic, simple molecular, macromolecular

Question 13

empircal, molec fma

Answer 13

emp= simplest whole num ratio

molec=true num atoms / mol

Question 14

ideal gas const val

Answer 14

8.31 J K-1 mol-1

Question 15

df meniscus

Answer 15

bottom part of lqd (when reading from mes cyclinder, lqd in thin cylinder has u shape x _ so mes base of u)