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Walther Kossel
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<p>Walther Ludwig Julius Kossel (4 January 1888 – 22 May 1956) was a <a href="/facts/German_people/F7mBCrJ4">German</a> <a href="/facts/Physicist/cQcgvSIm">physicist</a> known for his theory of the <a href="/facts/Chemical_bond/ArNUMnIB">chemical bond</a> (<a href="/facts/Ionic_bond/R6nUJI5u">ionic bond</a>/<a href="/facts/Octet_rule/X9jxSsos">octet rule</a>), <a href="/facts/Sommerfeld%25E2%2580%2593Kossel_displacement_law/2pjNlYeS">Sommerfeld–Kossel displacement law</a> of atomic spectra, the <a href="/facts/Terrace_ledge_kink_model/d9ASsPum">Kossel–Stranski model</a> for crystal growth, and the Kossel effect. Walther was the son of <a href="/facts/Albrecht_Kossel/Q5Qe7Dyl">Albrecht Kossel</a> who won the <a href="/facts/Nobel_Prize_in_Physiology_or_Medicine/rlnpJX84">Nobel Prize in Physiology or Medicine</a> in 1910. </p>