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Because Nucleus is composed of protons and neutrons..
An element have atomic weight 40 and it's electronic configuration is 1s 2 , 2s 2 , 2p 6 , 3s 2 , 3p 6 . Then its atomic number and number of neutrons will be: (1) 18 and 22
A copper tube 1 inch in diameter and 2 feet long is filled with steel balls of 1 inch in diameter. The space between the balls is filled with water. The specific gravity of steel i
applications of radioactivity
prepare a project corrosion of iron
what is the mass of a proton and electron
Q. Give the general formula of Organic Acids? Ans. Organic acids have the general formula RCOOH. The R- is an alkyl group or hydrogen. The functional group is -COOH and
how carbon tetra-valency lead to stability?
lithium and beryllium markedly differ from other members of their respective groups.
Why magnesium does not impart any colour to Bunsen flame while calcium does
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