(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 f...
Question 1 Report
(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
Answer Details
(a) Electronic configuration of the element with atomic number 15 (phosphorus)
Filling the sub-levels in order of increasing energy:
\[1s^2\,2s^2\,2p^6\,3s^2\,3p^3\]That is, \(2, 8, 5\) in the main shells. The three 3p electrons occupy the three p-orbitals singly (Hund's rule): \(3p_x^{1}\,3p_y^{1}\,3p_z^{1}\).
(b) Complex formed between ammonia and copper(II) ions
Formula: \([Cu(NH_3)_4]^{2+}\) (the tetraamminecopper(II) ion).
Colour: deep (royal) blue.
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