(a) Write the electronic configuration of an element with atomic number 15, indicating the distribution of electrons in the energy sub-levels
(b) Give the formula and the colour of the complex formed between ammonia and copper (II) ions
Explanation
(a) 1s(^2)2s(^2)2p(^6)3s(^2)3p(^3)
(b) Cu(^2) + 4NH(_3) —> Cu(NH(_3)^{2+}_4)
(Deep blue in colour)