an element have atomic weight 40 and its
An element have atomic weight 40 and it's electronic configuration is 1s2, 2s2, 2p6, 3s2, 3p6. Then its atomic number and number of neutrons will be:
(1) 18 and 22
(2) 22 and 18
(3) 26 and 20
(4) 40 and 18
Ans: (a)18 and 22
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the charge of an electron is -16 x10-19c the value of free charge on li ion will be1 36x 10-19c
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an element have atomic weight 40 and its electronic configuration is 1s2 2s2 2p6 3s2 3p6 then its atomic number and number of neutrons will be1 18
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