If the pool is 25 yards, and a lap is one length of the pool, then it would take 70.4 laps to go a mile. In a 25 meter pool you need to swim 64.4 laps. In collegiate swimming â¦ competitions, the swimmers in the mile event swim 64 laps in 25m pools.
Boron has five protons, and assuming it's not an ion, five electrons. The number of neutrons depends on the isotope. It can have anywhere from 2 to 14 neutrons, although only the isotopes with 5 or 6 neutrons is stable. Boron 11 (with 6 neutrons) is 80% of the boron found in nature, boron 10 (with 5 neutrons) is 20% of the boron found in nature. Source(s): The CRC Handbook of Chemistry and Physics, 79th Edition.
Boron (5 B) naturally occurs as isotopes 10 B and 11 B, the latter of which makes up about 80% of natural boron. There are 14 radioisotopes that have been discovered, with mass numbers from 6 to 21, all with short half-lives, the longest being that of 8 B, with a half-life of only 770 milliseconds (ms) and 12 B with a half-life of 20.2 ms.