C is incorrect. I has 21 PROTONS in its nucleus. Not neutrons.
Anions are mostly on the right side of the periodic table. They want to gain electrons so the can get closer to noble gas configurations. Ex. Cl-, Br- , O2.
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The term conservation of mass means that mass in any system can neither be created nor destroyed but can be transformed from one state to another.
<h3>What is the law of mass of conservation?</h3>
The law of conservation states that the mass in an isolated system can neither be created nor be destroyed but can be transformed from one form to another.
This means that when an element is involved in a chemical reaction, it's mass remains the same at the end of that reaction.
Learn more about mass here:
brainly.com/question/26150306
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