Subject
germanium
3
physical properties
silicon
2
aqueous solution
1
argon
1
bromide
1
carbonate
1
chemical properties
1
chloride
1
diamond
1
element
1
fluoride
1
hafnium
1
halide
1
helium
1
historical aspect
1
hydroxide
1
iodide
1
krypton
1
lead
1
neon
1
nitrate
1
occurrence
1
phosphate
1
preparation
1
radon
1
rare gas
1
silicon carbide
1
solution
1
sulfate
1
thorium
1
tin
1
titanate
1
titanium
1
xenon
1
zirconium
1