Bloch was born in Delatyn, Galicia, then Austro-Hungarian monarchy, on April 1, 1900, to a family of Hassidic Jewish scholars and rabbis, descendants of the Ba'al Shem Tov.

Bloch studied physics at the Prague's German Charles-Ferdinand University, where he received in 1924 his degree of Doctor of Natural Sciences (Dr. rer.

In 1920, at age 20, his father died and Bloch, who wanted to earn his living by himself, started to work as a journalist in the German-language newspaper Prager Tagblatt.

In 1929, Bloch was invited by Professor Jacques Errera to work with him at Brussels' Université Libre as a senior researcher at the chemical physics department.

Initially Bloch joined Dr. Weizmann's team in London and worked for about a year at the University of Cambridge, then, in the fall of 1935, he arrived in Rehovot (Eretz-Israel).

In addition to his managerial responsibilities at the Institute, Bloch contributed a great deal to numerous emerging organizations and establishments of "Ha-Yishuv" (the Jewish National Council in the British Mandate Palestine) and later, of the young state of Israel.

[7] It was a tragic coincidence that Bloch died just as the twenty-fifth anniversary of the Daniel Sieff Research Institute was being celebrated in Rehovot.