There are three primary ways that naturally occurring radioactive isotopes decay: 1  Alpha particle emission. 2  Beta particle emission. 3  Gamma radiation emission.
President condemns Ankara attacks. The current migration crisis is a problem of the entire EU and not of a particular country, Polish President Andrzej Duda said after the end of the Visegrad Group two-day summit in Balatonfuered, Hungary, on Friday.
The Polish gentry were the key opponents of Alexander IIâs reforms, leading the tsar to appoint Alexander Wielopolski (1803-1877), one of the more distinguished Polish statesmen, as a chief administrator in 1861.