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 letter was addressed to Russian President Vladimir Putin, US President Donald Trump, German Chancellor Angela Merkel, French President Francois Hollande, Polish President Andrzej Duda, as well as the heads of European bodies.