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There are 42 isotopes of polonium (84 Po). They range in size from 186 to 227 nucleons. They are all radioactive. 210 Po with a half-life of 138.376 days has the longest half-life of any naturally-occurring isotope of polonium and is the most common isotope of polonium.
5 – 3 7 – 6 Virginia Tech 5 – 3 7 – 6 North Carolina 4 – 4 8 – 5 No. 20 Clemson 4 – 4 9 – 4 Duke 4 – 4 8 – 5 Miami (FL) 3 – 5 7 – 6 Boston College 3 – 5 7 – 6 Syracuse 2 – 6 6 – 7 Virginia 2 – 6 3 – 9 Pittsburgh 2 – 6 3 – 9 Wake Forest 1 – 7 4 – 8 Championship: Florida State 16, Louisville 6
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No. 13 Penn State 7 – 2 10 – 3 Maryland 4 – 5 8 – 5 Rutgers 3 – 6 7 – 6 Michigan State 2 – 7 4 – 8 Indiana 1 – 8 3 – 9 West Division No. 24 Iowa xy 7 – 2 10 – 4 Northwestern 5 – 4 8 – 5 Wisconsin 5 – 4 7 – 6 Minnesota 3 – 6 6 – 7 Illinois 3 – 6 5 – 7 Nebraska 3 – 6 5 – 7 Purdue 3 – 6 4 – 8 ...
Rs. 10,000,000 question: 10% range (answer won't be shown even if one answers correctly) Rs. 100,000,000 question: One has to pick a number ( the question is the same one for 100,000,000 (question 4), but the contestant has to pick the number from the range you have selected in previous correct answer)
Naturally occurring europium (63 Eu) is composed of two isotopes, 151 Eu and 153 Eu, with 153 Eu being the most abundant (52.2% natural abundance).While 153 Eu is observationally stable (theoretically can undergo alpha decay with half-life over 5.5×10 17 years), 151 Eu was found in 2007 to be unstable and undergo alpha decay. [4]
The purpose of this page is to catalog new, interesting, and useful identities related to number-theoretic divisor sums, i.e., sums of an arithmetic function over the divisors of a natural number , or equivalently the Dirichlet convolution of an arithmetic function () with one:
56 is: The sum of the first six triangular numbers (making it a tetrahedral number). [1] The number of ways to choose 3 out of 8 objects or 5 out of 8 objects, if order does not matter. The sum of six consecutive primes (3 + 5 + 7 + 11 + 13 + 17) a tetranacci number [2] and as a multiple of 7 and 8, a pronic number. [3]