The three dots in the Lewis dot diagram for boron indicates that it. Please help

Part of molten rock at mid-ocean ridges

What is the empirical formula for c4h8o2

What are the first two quantum numbers for the electrons located in subshell 4d? what are the first three quantum numbers for the electrons located in subshell 2s? how many electrons can be held in a sublevel l = 3? how many electrons can be held in the energy level n = 4? how many electrons in an atom can share the quantum numbers n = 4 and l = 3?