The atomic number of manganese (Mn) is 25. What's the electron configuration for manganese? A. [Ar] 3s5 4p2
B. [Ne] 3d7
C. [Ne] 452 3p5
D. [Ar] 3d5 4s2

Consider a culture medium on which only gram-positive organisms such as staphylococcus aureus colonies can grow due to an elevated nacl level. a yellow halo surrounds the growth, indicating the bacterium fermented a sugar in the medium, decreasing the ph as a result and changing the color of a ph indicator chemical. this type of medium would be referred to as a differential and enrichment culture.