Answer:
arsenic
Explanation:helium is a gas and aluminum is a etal and carbon is not a maetalloid
Pretty sure it’s C but if it’s not I’m sorry
A mirror is opaque, meaning that it reflects the light and images that shine on it's reflective surface.
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Specific applications of mass spectrometry include drug testing and discovery, food contamination detection, pesticide residue analysis, isotope ratio determination, protein identification, and carbon dating.
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Cis-trans isomerism, also known as geometric isomerism or configurations isomerism is a term used in organic chemistry