Which element is a metalloid? <span>B. Silicon (Si) </span> Looking at the periodic table, which element is a metal? <span>D. Strontium (Sr) </span>Argon (Ar) is a noble gas, silicon (Si) is a metalloid, hydrogen (H) is a non-metal, and strontium is a alkaline earth metal. <span> I have used the periodic table from </span><span>http://chemreference.com/elements/1/properties?display=periodic&trend=number to help me when I'm unsure.</span>
