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Which one of the following is a correct electronic configuration of Sodium?
(a) 2, 8
(b) 8, 2, 1
(c) 2, 1, 8
(d) 2, 8, 1
If Z=3, what would be the valency of the element? Also, name the element.???
What is (i) Atomic number, ii) Mass number,
If K and L shells of an atom are full, then what would be the total number of electrons in the atom
If an atom contains one electron and one proton, will it carry any charge or not?
Find the value of k, if x = 2, y = 1 is a solution of the equation 2x+3y = k.