Why is diamond harder than graphite? ​

If two atoms are bonded to a central atom with no lone pairs,how will they be arranged

Which formula can be used to calculate the molar mass of hydrogen peroxide

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?