18 Group Flashcards
1
Q
What is major Constitution of noblegasses in air
A
Argon
2
Q
Source of helium
A
Natural gas
3
Q
Element of decay product of radium
A
Radon
4
Q
Cf an call collision
Gives
A
Organeson
5
Q
Highest bp and mp
A
Radon
6
Q
they have elextron gain enthalphy +/-
A
large positive values
7
Q
noble gases have very low mp values because
A
of they have dispersion forces
and helium have lowest mp of all elements
8
Q
only compound of krypton ,radon
A
krf2 , rnf2
9
Q
xeptf6 similar to
A
o2ptf6
10
Q
xe and f2
ratios and formations
A
excess xe xef2
1: 5 xef4
1: 20 xef6
11
Q
xef4 + o2f2
A
xef6+o2
12
Q
linear and 3 lone pairs
A
xef2
13
Q
square planar and 2 lp
A
xef4
14
Q
distorted octahedral 1lp
A
xef6
15
Q
xef2 +pf5
xef6 +mf
xef4 +sbf5
A
xef]+ +pf6-
xef7- + m+ [na,k,rb,cs]
xef3+ +sbf6-
