What are the coefficients that make this a balanced equation? ₃ → ₂ *

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

Which of the following units is not an official si unit? mole liter kilogram ampere

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?