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 has three valence electrons. It is in group 13. Outermost energy level is the the 3rd energy level and it has three electrons. Valence electrons are the electrons in the last energy level of an atom. You can also just look at the group number (13) and the second number is the number of valence electrons.