group 15 Flashcards
1
Q
p block group
A
13 to 18
2
Q
general ec
A
ns2np1-6
3
Q
p block has
A
M, NM, METALLOIDS
4
Q
group 15 elements
A
nitrogen phosphorus arsenic antimony bismuth moscovium
5
Q
non metal
A
n and p
6
Q
metalloid
A
as antimony
7
Q
metal
A
bismuth and moscovium
8
Q
nitrogen in atmosphere
A
78 per
9
Q
n in earths crust
A
nano3 and kno3
10
Q
nano3
A
chile saltpetre
11
Q
kno3
A
indian saltpetre
12
Q
n in p and a
A
as proteins
13
Q
p occurs as
A
minerals of apatite family
14
Q
apatite formula
A
ca9(po4)6.cax2
15
Q
x=
A
f, cl or oh
16
Q
ca9(po4)6 .caf2
A
fluroapatite
17
Q
apatite are components of
A
p rocks
18
Q
p in p and a
A
matter
in bones and living cells
19
Q
phosphoproteins in
A
milk and eggs
20
Q
as ar bi occur as
A
sulphide minerals
21
Q
mo occur
A
synthetic radioactive elemnt
22
Q
an and mass pf ans symbol of mo
A
115
289
mc
23
Q
ec of grp 15
A
ns2np3
24
Q
covalent radius big change in
A
n an p
25
cr small change and why
as to bi completely filled d and f orbitals
26
en in heavier element
diff is not much pronounced
27
all elements are -------atomic
poly
28
diatomic gas
dinitrogen
29
others
solids
30
metallic cr down the grp and why
increases
| decrease in ie and in in size
31
boiling point down the grp
increases
32
melting point
increase upto arsenic and then dcreases upto bismuth
33
all elemnts show allotropy except
nitrogen
34
common oxidation s of grp 13
-3
+3
+5
35
the tendency of -3on down the grp and why
decrease
| in in size and metallic crter
36
last memb ?
| hardly have -----on
bismuth
| -3
37
+5 on down the grp
decreases
38
the only bi having +5
bif5
39
+3 on down the grp and why
increases
| inert pair effect
40
nitrogen also have --------------on when it reacts with ------
1 2 4
| oxygen
41
n does not have 5 on with
| and why
halogens
| absence of d orbital to accomodate es
42
p also show------- on in some------
1 4 '
| oxoacids
43
nitrogen in all on-------- disproportionate in
acid
44
max covalency of nitrogen and why
4
| only four orbital available
44
covalency in heavier element example
pf6-
44
on of as an and bi which is stable
+3
44
p disp in ------ into which on
alkali and acid
| -3 and +5
45
anomalous prop of n2 reason
small size
high en and ie
absence of d orbital
46
n2 form ppi-ppi bond with
itself and others having small size and high en(c,o)
47
heavy elements do not form----- bond and why
ppi-ppi
| ao are large and they cannot have effective overlapping
48
n exist as
diatomic with triple bond
49
bond enthalpy of n
very high
| 941.4kj
50
single bond seen in
p
as
sb
51
bismuth form which bond in elemental state
metallic
52
n-n weaker/strong than p-p and why
weaker
high repulsion of lp and small bond length
therefore catenation tedency is weak in n
53
n cannot form which bond
dpi - dpi
54
dpi-dpi shown by and examples
heavy metals
r3p=o
r3p=ch2
55
p and as form dd bond with
transition metal when their compounds like p(c2h5)3 and as(c6h5)3 act as ligands
56
hydrides formula of grp 13
eh3
57
stability of hydrides down the grp
decraeses
58
reducing cr of hydrides down the grp
incraeses
59
ammonia -mild ra
| bis
strongest ra amomg all hydrides
60
basicity down the grp
decreases
61
due to small size and high en of n nh3
exhibits h onding in solid as well as liquid
| therefore has higher mp and bp than ph3
