Except Helium, all noble gases have how many electrons in the outermost shell?
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What is the process of slow cooling of hot glass called?
Sphalerite is an ore/mineral of
The maximum number of electrons that can be accommodated in a shell is indicated by the formula
Name the Russian chemist who stated that the properties of elements are a periodic function of their atomic masses?
What is the atomicity of Phosphorous?
The gas evolved when sodium carbonate reacts with hydrochloric acid is
The number of neutrons present in a nitrogen atom is ___.
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