Q2 / 160 · TS EAMCET 2018 (04 May Shift 2) · Chemistry

The order of filling of electrons in orbitals in Ti is

  • A
    $1 s, 2 s, 2 p, 3 s, 3 p, 3 d$ and $4 s$
  • Correct answer
    B
    $1 s, 2 s, 2 p, 3 s, 3 p, 4 s$ and $3 d$
  • C
    $1 s, 2 s, 2 p, 3 s, 4 s, 3 p$ and $3 d$
  • D
    $1 s, 2 s, 2 p, 3 s, 3 d, 3 p$ and $4 s$

Solution

According to Aufbau principle the order of filling of electrons in orbitals is $1 s^2, 2 s^2, 2 p^6, 3 s^2, 3 p^6, 4 s^2, 3 d^{10}, 4 p^6 \ldots \ldots$ $\mathrm{Ti}=22$ electrons. So, the order of filling of electrons in orbital is $\mathrm{Ti}=1 s^2, 2 s^2, 2 p^6, 3 s^2, 3 p^6, 4 s^2, 3 d^2$

Hence, the correct answer is option: 'B'.

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