His location and salon does not warrant higher than $300 a month. The hair stylist are paying $200 a week. I dont know why. But it depends on location, and perks as to what rent should be. It will vary so much.
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.
No known element has more than 32 electrons in any one shell. This is because the subshells are filled according to the Aufbau principle. The first elements to have more than 32 electrons in one shell would belong to the g-block of period 8 of the periodic table. These elements would have some electrons in their 5g subshell and thus have more than 32 electrons in the O shell (fifth principal shell).