4. explain what you’ve learned about significant figures. how many significant figures are in the measurement 0.03050 kg?

There are 4 significant figures! Start counting after the first non-zero digit :)

Hope this helps.

altitude, density, pressure

air gets less dense the higher the altitude and also the air pressure is less as altitude rises.

the electronic configuration of an atom with eight electrons is 1s²2s²2p⁴. the orbital diagrams are shown in the figure.

as per the hunds rule:

1. electrons tend to avoid being in the same orbital as per as practicable.

2. electrons in different orbitals of the same energy will have their spin parallel.

this can be illustrated from the multiplicity of the orbitals of the atom. as there are four electrons in the p orbital and p orbital has 3 sub-shells. the electrons can be fed in different ways as shown in the figure but the correct orbital diagram will be as per the hunds rule.