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For a given value of quantum number l , the number of allowed values of is given by:
(1) l+2
(2) 2l+2
(3) 2l+ 1
(4) l + 1
Ans: 2l+ 1
Which forms a crystal of Nacl: (1) Nacl molecules (2) Na + and cl - ions (3) Na andcl atoms (4) None of the above Ans: Na + and cl - ions
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how to solve them?
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Which one of the following is considered as the main postulate of Bohr's model of atom: (1) Protons are present in the nucleus (2) Electrons are revolving around the nucleu
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