Classification of elements Flashcards
1
Q
Metallic char increases
A
down
2
Q
Size increases, ΔiH
A
decreases
3
Q
s block elemetns
A
Metals, less ΔiH, very reactive, forms ionic cmpds except Li & Be
4
Q
p block elements
A
Non metals are acidic/neutral
metalloids are amphoteric
metals are basic
5
Q
f block E.C
A
(n-2)f^1-14 (n-1)d^0-1 ns2
6
Q
ionic radius =
A
r(cat) + r(ani)
7
Q
When Z/e decreases, ionic radius
A
increase
8
Q
Ionic radius increases
A
down
9
Q
Factors affecting ΔiH
A
Size, Screening effect - inverse
Nuclear charge - prop
Penetration effect - S>P>D>F
10
Q
ΔegH increase
A
across period
11
Q
ΔegH2 always
A
+ve
12
Q
When size increase, ΔegH
A
increase
13
Q
At 0 temp, ΔegH is called
A
e’ affinity
14
Q
ΔegH =
A
Ae - 5/2RT Ae is e’ affinity
15
Q
Electronegativity depends on
A
Size - inverse
Nuclear charge - prop
