acetic acid
chloroform
urea
methane
C. urea
number of neutrons in the nucleus
number of protons and neutrons in the nucleus
the valency of the element
number of protons in the nucleus
cobalt
tin
manganese
platinum
hydrochloric acid
citric acid
tartaric acid
acetic acid
n-heptane
n-octane
iso-heptane
iso-octane
carbohydrates
proteins
salts
fats
nervous disorders
heart diseases
anaemia
impairment of vision
nickel
aluminium
mercury
calcium
nickel
tin
iron
chromium
nitrogen
helium
neon
argon
methane
nitrogen
carbondioxide
ethylene
Tin
Silver
Iodine
Arsenic
oxidise ammonia to nitrates
convert nitrogen into ammonia
oxidise ammonia to free nitrogen
oxidise ammonia to oxides of nitrogen
Fe and C
Mn and C
Fe and Mn
Fe, Mn and C
Rutherford
Moseley
Niels Bohr
J.J. Thomson
graphite
phosphorus
sulphur
iodine
low pressure and high temperature
low pressure and low temperature
high pressure and low temperature
high pressure and high temperature
Radon
Astatine
Cesium
Ruthenium
chloroform
acetic acid
phenol
carbon tetrachloride
calcium carbonate
sodium carbonate
magnesium sulphate
ferric chloride
Carbon monoxide
Oxygen
Nitrogen
Hydrogen
sublimation
oxidation
reduction
decomposition
shaking with caustic soda solution
shaking with water
fractional distillation of liquid air
passing air over heated magnesium
tine
magnesium
zinc
copper
nitrogen
nitric oxide
nitrogen peroxide
nitrous oxide
evaporation
sublimation
using a separating funnel
fractional distillation
Oxygen
Air
Hydrogen
Chlorine
whooping cough
tetanus
diphtheria
All the three
adrenalin
glucagon
epinephrin
thyroxin
in the treatment of malaria
to relieve sleepiness
to induce sleep
to lower body temperature
Bronze
Brass
Solder
Gun metal