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28 Si (the most abundant isotope, at 92.23%), 29 Si (4.67%), and 30 Si (3.1%) are stable. The longest-lived radioisotope is 32 Si, which is produced by cosmic ray spallation of argon . Its half-life has been determined to be approximately 150 years (with decay energy 0.21 MeV), and it decays by beta emission to 32 P (which has a 14.27-day half ...
2 July 2019 – 15 July 2024: Member of the Senate for Bucharest; In office 20 December 2016 – 19 June 2019: Leader of the People's Movement Party; In office 27 March 2016 – 16 June 2018: Preceded by: Eugen Tomac: Succeeded by: Eugen Tomac: Leader of the Democratic Party; In office 19 May 2001 – 18 December 2004: Preceded by: Petre Roman ...