19 November 1893
Leiden, Netherlands, 14 March 1976)
chemist

Anton Eduard van Arkel



Anton Eduard van Arkel

19 November 1893
Leiden, Netherlands, 14 March 1976)
chemist

Anton Eduard van Arkel



An apparatus used for the process. The main body is quartz glass. (1) to vacuum pump, (2) 6 mm molybdenum electrode, (3) molybdenum net, (4) chamber for the raw metal, (5) tungsten wire

19 November 1893
Leiden, Netherlands, 14 March 1976)
chemist

Anton Eduard van Arkel



A collection of pnictogen samples

Denisovka, Russia, 19 November 1711
Saint Petersburg, Russia, 15 April1765
scientist and literary man

Mikhail Lomonosov



Mikhail Lomonosov

Heroes' birthday on Google Play