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.
Since the first orbital shell has only two electrons, we know that Boron has two shells: one with two 1s electrons and one with three electrons from the 2s and 2p orbitals. As another example, an element like chlorine will have three orbital shells: one with two 1s electrons, one with two 2s electrons and six 2p electrons, and one with two 3s electrons and five 3p electrons.