1. Tardigrade
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  3. Chemistry
  4. An element has electronic configuration 1s2, 2s2, 2p6, 3s2, 3p3 Predict their period, group and block

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Q. An element has electronic configuration $1s^{2}, 2s^{2}, 2p^{6}, 3s^{2}, 3p^{3}$ Predict their period, group and block

Classification of Elements and Periodicity in Properties

Solution:

By observing principal quantum number (n), Orbital $(s, p, d, f)$ and equating no. of $e^{-}$’s we are able to find the period, block and group of element in periodic table