B is correct. Krypton is a noble gas which has a full outer shell of 8 electrons and is generally unreactive because of it.
Synergistic Interaction
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mostly collagen and some calcium phosphate
Answer:
Chemical properties are tested on not because of their color or their appearance but how they will react to certain tests. Such as; is it flammable? Could it be toxic? Physical properties are tested on and observed because of the texture, the color, smell and etc.
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