Identify the correct statements from the following: A. Heisenberg uncertainty principle is applicable to electrons. B. The size of 2p_x orbital is less than the size of 3p_x orbital. C. The energy of 2s orbital of H atom is equal to the energy of 2s orbital of Li. D. The electronic configuration of Cr is [ Ar ] 3d^5 4s^1 Choose the correct answer from the options given below:

Step-by-step solution

Statement A is correct. Heisenberg's uncertainty principle is applicable to microscopic particles such as electrons. Statement B is correct. The size of an orbital increases with an increase in the principal quantum number n . Thus, the size of the 3p_x orbital is greater than that of the 2p_x orbital. Statement C is incorrect. The energy of an orbital depends on the effective nuclear charge. Since the nuclear charge of Li ( Z=3 ) is greater than that of H ( Z=1 ), the energy of the 2s orbital of Li is lower than t