Answer:
Hello
The mass number tells us the number (the sum of nucleons) of protons and neutrons in the nucleus of an atom.
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<em>Source: https://socratic.org/questions/what-does-the-mass-number-tell-us</em>
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Best regards
A proper chemical storage includes the following;
-
Management – this includes of managing the
storage area of the chemical and how they are stored base on their difference
and property
-
Compliance – this is the action needed in means
of having to be able to understand the properties of the chemical in order to
know what action is needed to engaged on
The answer is the first one A
