1. What are the 4 most important human impact to the environment? Write about one of your answer.

All of the following are part of the biosphere except

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true

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?