WHich ingredient could be eliminated if the SIM medium was used strictly for testing motility among sulfur reducers

The big bang nucleosynthesis theory states that elements were produced in the first few minutes of the big bang while elements have their origins in the interiors of stars, forming much later in the history of the universe.

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)

How many absorptions would you expect to observe in the 13c nmr spectra of the following molecules? a) 3-chloropentane b) cis-4-methyl-2-pentene