<span>Good Morning!
Products that produce fatal vapors are called "toxins". Although corrosive, flammable and reactive substances also have the ability to cause death to humans. In this case, they are called toxic.
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When a molecule loses or gains an electron it becomes an ion.
"If it gains a negative electron, it becomes a negative ion. If it loses an electron it becomes a positive ion."
The mass number of an atom is obtained by totalling up the number of protons and neutrons there are for that atom.
Answer:
b hope I am right if not I am so sorry
Explanation:
On the bottom
1. sharing electrons
2. the middle two dots between the F:F