The number of neutrons present in a nitrogen atom is ___.
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Sphalerite is an ore/mineral of
15% of an alloy was silver. If in a quantity of alloy there was 51 g of silver, what was the quantity of the other elements in the alloy?
The maximum number of electrons that can be accommodated in M shell is
Which of the following elements replaced eka-Aluminium in Mendeleev's Periodic table?
What is the atomicity of Phosphorous?
The most active ingredient in bleaching powder is
How many atoms will one mole of Carbon (C-12) contain?
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