Which combinations of n and l represent real orbitals, and which do not exist a) 2s b) 3p c) 5s d) 1d

2points what is the job of a scientist? a. to answer ethical questions. b. to write laws based on his or her knowledge. c. to ask and answer scientific questions. d. to ignore facts that do not support his or her theory.

Brainliesttt me asap! the below reaction can be categorized as more than one type of reaction. which reactions are these, and what are the types of reactions?

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.