What did you observe about the sample of fertilizer?

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?

The element that has the greatest electronegativity is

When a device is used in a circuit in which the voltage is 81 v the current flowing through the device is 3 a what is the resistance of the device