Answer: i feel it should be c
Explanation:
Potassium is just below the sodium in periodic table in s group !
so the valence electron of sodium and potassium is same and that is 1 !
Petri (the person that invented the Petri dish) invented the transparent glass lidded dishes which were meant for keeping and growing bacteria and other stuff including fungi and mosses sterilized. It dated back to the late 1800s.
False.
The equipment and tubing might have still been touched or used, even if there isn't blood inside. All equipment should be thoroughly cleaned before use, or if necessary, discarded.
