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p block > group 15 > Flashcards

group 15 Flashcards

1
Q

p block group

A

13 to 18

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2
Q

general ec

A

ns2np1-6

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3
Q

p block has

A

M, NM, METALLOIDS

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4
Q

group 15 elements

A 
nitrogen
phosphorus
arsenic
antimony
bismuth
moscovium
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5
Q

non metal

A

n and p

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6
Q

metalloid

A

as antimony

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7
Q

metal

A

bismuth and moscovium

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8
Q

nitrogen in atmosphere

A

78 per

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9
Q

n in earths crust

A

nano3 and kno3

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10
Q

nano3

A

chile saltpetre

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11
Q

kno3

A

indian saltpetre

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12
Q

n in p and a

A

as proteins

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13
Q

p occurs as

A

minerals of apatite family

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14
Q

apatite formula

A

ca9(po4)6.cax2

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15
Q

x=

A

f, cl or oh

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16
Q

ca9(po4)6 .caf2

A

fluroapatite

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17
Q

apatite are components of

A

p rocks

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18
Q

p in p and a

A

matter

in bones and living cells

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19
Q

phosphoproteins in

A

milk and eggs

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20
Q

as ar bi occur as

A

sulphide minerals

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21
Q

mo occur

A

synthetic radioactive elemnt

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22
Q

an and mass pf ans symbol of mo

A

115
289
mc

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23
Q

ec of grp 15

A

ns2np3

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24
Q

covalent radius big change in

A

n an p

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25
Q

cr small change and why

A

as to bi completely filled d and f orbitals

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26
Q

en in heavier element

A

diff is not much pronounced

27
Q

all elements are ——-atomic

A

poly

28
Q

diatomic gas

A

dinitrogen

29
Q

others

A

solids

30
Q

metallic cr down the grp and why

A

increases

decrease in ie and in in size

31
Q

boiling point down the grp

A

increases

32
Q

melting point

A

increase upto arsenic and then dcreases upto bismuth

33
Q

all elemnts show allotropy except

A

nitrogen

34
Q

common oxidation s of grp 13

A

-3
+3
+5

35
Q

the tendency of -3on down the grp and why

A

decrease

in in size and metallic crter

36
Q

last memb ?

hardly have —–on

A

bismuth

-3

37
Q

+5 on down the grp

A

decreases

38
Q

the only bi having +5

A

bif5

39
Q

+3 on down the grp and why

A

increases

inert pair effect

40
Q

nitrogen also have ————–on when it reacts with ——

A

1 2 4

oxygen

41
Q

n does not have 5 on with

and why

A

halogens

absence of d orbital to accomodate es

42
Q

p also show——- on in some——

A

1 4 ‘

oxoacids

43
Q

nitrogen in all on——– disproportionate in

A

acid

44
Q

max covalency of nitrogen and why

A

4

only four orbital available

44
Q

covalency in heavier element example

A

pf6-

44
Q

on of as an and bi which is stable

A

+3

44
Q

p disp in —— into which on

A

alkali and acid

-3 and +5

45
Q

anomalous prop of n2 reason

A

small size
high en and ie
absence of d orbital

46
Q

n2 form ppi-ppi bond with

A

itself and others having small size and high en(c,o)

47
Q

heavy elements do not form—– bond and why

A

ppi-ppi

ao are large and they cannot have effective overlapping

48
Q

n exist as

A

diatomic with triple bond

49
Q

bond enthalpy of n

A

very high

941.4kj

50
Q

single bond seen in

A

p
as
sb

51
Q

bismuth form which bond in elemental state

A

metallic

52
Q

n-n weaker/strong than p-p and why

A

weaker
high repulsion of lp and small bond length
therefore catenation tedency is weak in n

53
Q

n cannot form which bond

A

dpi - dpi

54
Q

dpi-dpi shown by and examples

A

heavy metals
r3p=o
r3p=ch2

55
Q

p and as form dd bond with

A

transition metal when their compounds like p(c2h5)3 and as(c6h5)3 act as ligands

56
Q

hydrides formula of grp 13

A

eh3

57
Q

stability of hydrides down the grp

A

decraeses

58
Q

reducing cr of hydrides down the grp

A

incraeses

59
Q

ammonia -mild ra

bis

A

strongest ra amomg all hydrides

60
Q

basicity down the grp

A

decreases

61
Q

due to small size and high en of n nh3

A

exhibits h onding in solid as well as liquid

therefore has higher mp and bp than ph3

p block (1 decks)

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