Answer:
First Option: B)
Second Option: C)
<em>The pictures below will show the answers. The first picture is the first option, and the second picture is the second option.</em>
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A medium that works by showing two reaction types is called a differential medium
<h3>Differential media</h3>
Differentia media are one of the numerous culture media used in culturing microorganisms. They are also known as indicator media.
They are called differential media because they are able to make a distinction between two microorganisms growing on them based on the biochemical characteristics of some organisms in the presence of certain indicators or nutrients.
More on differential media can be found here: brainly.com/question/12944497
Answer:
C. gold atoms
Explanation:
Metallic bonds are found between atoms of metals. Since gold is the only metal given here, it is the solution to the problem.
Metallic bonds join atoms of metals and alloys together.
The formation of this type of bond is favored by large atomic radius, low ionization energy and a large number of electrons in the valence shell.
The metallic bond is actually an attraction between the positive nuclei of all the closely packed atoms in the lattice and the electron cloud jointly formed by all atoms losing their outermost shell electrons.
I would say you should use or test it once a week to ensure it is working properly in an active laboratory since it is a workplace with significant chemical hazards so it would give peace of mind to know on a quite regular basis that it can be relied on in case of an emergency like an eye flush for example.
