What is the number of electrons in an atom that has 20 protons and 17 neutrons.

What metric units would you use to measure the thickness of a key

Ill give u brainliest pls how is mass of carbon conserved during cellular respiration

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.