Which of the following is true ?A. The outer electronic configuration of the ground state chromium atom is `3d^(4)4s^(2)`B. Gamma rays are electroomagnetic radiations of wavelength of `10^(-6) cm"to" 10^(-5) cm `C. The energy of the electron in the `3d` orbital is less than that in the `4s` orbital of a hydrogen atomD. The electron density in the xy plane in `3d_(s^(2) - y^(2)` orbital is zero

Which of the following is true ?A. The outer electronic configuration

1.	Which of the following is true ?A. The outer electronic configuration of the ground state chromium atom is `3d^(4)4s^(2)`B. Gamma rays are electroomagnetic radiations of wavelength of `10^(-6) cm"to" 10^(-5) cm `C. The energy of the electron in the `3d` orbital is less than that in the `4s` orbital of a hydrogen atomD. The electron density in the xy plane in `3d_(s^(2) - y^(2)` orbital is zero
Answer» Correct Answer - C a. The configuration is `3d^(5) 4s&^(2)` b The wavelength atom , the enrgy of an order of ` 10^(-11) m ` c. In hydrogen atom , the energy of an el,ectron depends only on the principle quantum number of the orbitals which it occupes d. In xz plane is not electron density if an electron occupies `3d_(x^(2) - y^(2)` orbital

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