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Metal, Nonmetal, or Metalloid - Announcements tissues. Wear chemical splash goggles, chemical-resistant gloves, and a chemical-resistant apron. Procedure: Pre-Laboratory Preparation 1. Obtain small samples of the four elements, labeled A, B, C and D. 2. Make a hypothesis about what class of element (metal, nonmetal or metalloid) you think each element is based on how it looks. 3. Which Elements Are Covalent? | Sciencing Covalent bonds are chemical bonds in which two or more elements join together by sharing electrons, rather than transferring electrons, as is the case with ionic bonds. These bonds tend to occur with nonmetal elements of the periodic table. Which Is The Most Reactive Element In The Periodic Table ... Fluorine is identified as the most electronegative element in the periodic table, making it the strongest reducing agent. It is the most reactive non-metal. Caesium is the most reactive metal in the periodic table, so much that working with this metal often ends in explosions!    Read More