Suppose that e(x 1 ) = μ, var(x 1 ) = 7, e(x 2 ) = μ, var(x 2 ) = 13, e(x 3 ) = μ, and var(x 3 ) = 20, and consider the point estimates ˆ μ 1 = x 1 3 + x 2 3 + x 3 3 ˆ μ 2 = x 1 4 + x 2 3 + x 3 5 ˆ μ 3 = x 1 6 + x 2 3 + x 3 4 + 2 (a) calculate the bias of each point estimate. is any one of themunbiased?

The orbital diagram represents the filling of electrons in the sub levels of an orbit. The filling of the orbitals in sub- levels follow some basic rules and principles.

The orbital diagram of an orbit containing 16 electrons will be as follows:

    1s²2s²2p⁶3s²3p⁴

The maximum number of electrons in each sublevel of the orbitals are:                  2 electrons for s-sublevel with one orbital                  6 electrons for p-sublevel with three orbital                  10 electrons for d-sublevel with five orbital                  14 electrons for f-sublevel with seven orbital