iodine
sulphur
graphite
phosphorus
C. graphite
gold
zinc
tin
molybdenum
increases the atomic mass of the atom
decreases the atomic mass of the atom
increases the charge on the nucleus
decreases the charge on the nucleus
Lead
Tin
Silver
Gold
nitrogen
nitric oxide
nitrogen peroxide
nitrous oxide
as a drying agent
as a refrigerant
as an antiseptic
as a bleaching agent
CaO
Ca(OH)2
NaOH
Na2CO3
manganese dioxide
bauxite
animal charcoal
quicklime
shaking with caustic soda solution
shaking with water
fractional distillation of liquid air
passing air over heated magnesium
Kerosene oil
Diesel oil
Lubricating oil
Petroleum ether
Nitric acid
Hydrochloric acid
Silver nitrate
Sulphuric acid
pyridine
hydrogen sulphide
cacodyl
carbylamines
a disinfectant
an analgesic
a hypnotic
a dye
gypsum
urea
potassium nitrate
ammonium phosphate
wrought iron
steel
pig iron
nickel steel
evaporation
sublimation
using a separating funnel
fractional distillation
a deliquescent substance
an efflorescent substance
a hygroscopic substance
a dehydrating substance
nitrogen
helium
neon
argon
asphalt
naphtha
diesel oil
lubricating oil
the manufacture of explosives
the manufacture of dyes
refrigerators
the preparation of drugs
A
C
B12
B1
annealing
hardening
quenching
tempering
Dolomite
Magnetite
Bauxite
Anglesite
hydrochloric acid
citric acid
tartaric acid
acetic acid
magnetic oxide of iron
ferric oxide
ferrous oxide
ferrous carbonate
Tungsten steel
Manganese steel
Chromium steel
Nickel steel
acid fumes
sodium bicarbonate
carbon dioxide
sodium carbonate
diamond
coke
graphite
charcoal
it contains carbonates of calcium and magnesium
it contains sodium chloride
it is highly coloured
it contains suspended impurities
acetic acid
oxalic acid
chromic acid
citric acid
urea
methane
acetic acid
benzene