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- The decay mode of Ca-37 is β+ therefore, Ca-37 transmutes naturally into K-37 by giving off a positron.
20Ca37 → 19K37 + +1e0
- Calcium (Ca) has a total of 24 isotopes, from 34Ca to 57Ca. There are five observationally stable isotopes (40Ca, 42Ca, 43Ca, 44Ca and 46Ca), plus one isotope (48Ca) with such a long half-life that for all practical purposes it can be considered stable.
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What is the half-life of calcium?
In my (rather old) reference, Calcium has isotopes from Ca37 through Ca50. It has stable isotopes of Ca40, Ca42, Ca43, Ca44, Ca46, and Ca48. Ca40 is the dominant isotope with 96.94% of the total naturally occurring metal. The average of the natural Ca is 40.08. Ca42 has a half life of 1.3x105 years, Ca45 has 16.3 days, and Ca47 has 4.5 days.
What is California's current delegation in the House of Representatives?
The following members of the U.S. House of Representatives were elected to the 113th Congress (January 3, 2013 - January 3, 2015):CD CA01 - Doug LaMalfa (R; 1st term)CD CA02 - Jared Huffman (D; 1st term)CD CA03 - John Garamendi (D; 2nd full term)CD CA04 - Tom McClintock (R; 3rd term)CD CA05 - Mike Thompson (D; 8th term)CD CA06 - Doris Matsui (D; 4th full term)CD CA07 - Ami Bera (D; 1st term)CD CA08 - Paul Cook (R; 1st term)CD CA09 - Jerry McNerney (D; 4th term)CD CA10 - Jeff Denham (R; 2nd term)CD CA11 - George Miller (D; 20th term)CD CA12 - Nancy Pelosi (D; 13th full term)CD CA13 - Barbara Lee (D; 8th full term)CD CA14 - Jackie Speier (D; 3rd full term)CD CA15 - Eric Swalwell (D; 1st term)CD CA16 - Jim Costa (D; 5th term)CD CA17 - Mike Honda (D; 7th term)CD CA18 - Anna Eshoo (D; 11th term)CD CA19 - Zoe Lofgren (D; 10th term)CD CA20 - Sam Farr (D; 10th full term)CD CA21 - David Valadao (R; 1st term)CD CA22 - Devin Nunes (R; 11th term)CD CA23 - Kevin McCarthy (R; 4th term)CD CA24 - Lois Capps (D; 8th full term)CD CA25 - Buck McKeon (R; 11th term)CD CA26 - Julia Brownley (D; 1st term)CD CA27 - Judy Chu (D; 2nd full term)CD CA28 - Adam Schiff (D; 7th term)CD CA29 - Tony Cardenas (D; 1st term)CD CA30 - Brad Sherman (D; 9th term)CD CA31 - Gary Miller (R; 8th term)CD CA32 - Grace Napolitano (D; 8th term)CD CA33 - Henry Waxman (D; 20th term)CD CA34 - Xavier Becerra (D; 11th term)CD CA35 - Gloria Negrete McLeod (D; 1st term)CD CA36 - Raul Ruiz (D; 1st term)CD CA37 - Karen Bass (D; 2nd term)CD CA38 - Linda Sánchez (D; 6th term)CD CA39 - Ed Royce (R; 11th term)CD CA40 - Lucille Roybal-Allard (D; 11th term)CD CA41 - Mark Takano (D; 1st term)CD CA42 - Ken Calvert (R; 11th term)CD CA43 - Maxine Waters (D; 12th term)CD CA44 - Janice Hahn (D; 1st full term)CD CA45 - John B. T. Campbell III (R; 4th full term)CD CA46 - Loretta Sanchez (D; 9th term)CD CA47 - Alan Lowenthal (D; 1st term)CD CA48 - Dana Rohrabacher (R; 13th term)CD CA49 - Darrell Issa (R; 7th term)CD CA50 - Duncan D. Hunter (R; 3rd term)CD CA51 - Juan Vargas (D; 1st term)CD CA52 - Scott Peters (D; 1st term)CD CA53 - Susan Davis (D; 7th term)
