2. Atomic Structure

Question 1

extent of deflection formula

Answer 1

proportional to |charge| / mass

Question 2

define Ionisation Energy (IE), with eqn

Answer 2

energy req to remove 1mol of e from 1mol of gaseous atoms to form 1mol of singly-charged gaseous cations

X(g) –> X+(g) + e

Question 3

How IE/radius changes across *period/^down the grp

Answer 3

1. num p inc, nuclear charge inc
2. shielding eff
   (*successive e added to same subshell)
   (^no. principal quantum shell inc)
3. eff nuclear charge __
   (^outermost e/shell further from nu/attracted more closely to nu)
4. attraction btw nu and outermost e/shell __

Question 4

Anomaly
ns2 vs ns2 np1
󠄀

Answer 4

• higher energy subshell
• experience inc shielding provided by filled 2s subshell

Question 5

Anomaly
ns2 p3 vs ns2 np4

Answer 5

paired 2px electron exp
inter-electronic repulsion

Question 6

successive IE: why large inc

Answer 6

e removed from INNER principal quantum shell

Question 7

describe trend of ionic radius across period

Answer 7

1. ionic rad dec for ions w same isoelectric configuration
2. anions larger than cations cuz one more shell of e

Question 8

how does radius of ions compare to their respective atoms

Answer 8

1. cation < atom
   (1 less shell of e)
2. anion > atom
   (e>p, net attractive force for valence e by Nu dec)