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Periodic Classification of Elements and Periodicity - 5
1.
Dobereiner
a) Atomic Numbers
b) Amphoteric oxides
c) Octave
d) Triads
2.
Metalloids
a) Octave
b) Triads
c) Amphoteric oxides
d) Atomic Numbers
3.
Mendeleev
a) 1871
b) Octave
c) 1929
d) Triads
4.
S
2
Cl
2
a) -184
o
C
b) 192
o
C
c) -93
o
C
d) -80
o
C
5.
AlCl
3
a) 0.0
o
C
b) -80
o
C
c) 715
o
C
d) 192
o
C
6.
H
2
O
a) 192
o
C
b) -80
o
C
c) 715
o
C
d) 0.0
o
C
7.
CH
4
a) -184
o
C
b) 715
o
C
c) -93
o
C
d) -80
o
C
8.
PCl
3
a) -80
o
C
b) 0.0
o
C
c) -93
o
C
d) 715
o
C
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