(a) Write the electronic configuration of an element with atomic number 15, indicating the distribution
CHEMISTRY
WAEC 1990
(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)
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