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 atomic number of an element is 35 and mass number is 81 the number of electrons in the outer most shell is1 7 2
which of the following is not isoelectronic1 na 2
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
the nucleus of tritium contains1 1 proton 1 neutron 2 1 proton 3
which one of the following groupings represents a collection of isoelectronic species1 na ca2 mg2 2 n3 f- na3 be al3
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the number of electrons in cl- ion is1 19 2 20 3 18 4 35ans
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