The location and energy of an electron in an atom can be
specified by
1 Atomic mass
2 Atomic number
3 Quantum numbers
4 None of these
where the 3rd earthsummit held
Which of the following is used as a coolant in nuclear reactors? 1 Heavy water 2 Cadmium 3 Liquid sodium 4 None of these
2 Answers WBCS West Bengal Civil Service,
Which of the following gases is used as an illuminant in lamps used by hawkers? 1 Methane 2 Ethylene 3 Acetylene 4 Hydgrogen
what are advantages of excess populatoin?
Detergents used for cleaning clothes and utensils contain 1 Nitrates 2 Bicarbonates 3 Sulphonates 4 Bismutnates
why is it important that sex cells have half the number of Chromosomes as body cells?
what are the advantages and disadvantages of empirical knowledge?
171.116.0.0 VLSM require 112 ip addresses answer = 128/23 255.255.254.0 rang 2 network address 172.116.0.0 gateway 172.116.1.0 broadcast 172.116.127.0
The metallic constituents of hard water are 1 Magnesium, calcium and tin 2 Iron, tin and calcium 3 Calcium, ,magnesium and iron 4 None of these
HELPS IN PROPAGATING RADIO SIGNALS
When and where was the first experimental atomic explosion took place?
Carbon, diamond and graphite are together called 1 Isomers 2 Allotropes 3 Isomorphs 4 Isotopes