mercury, only metal liquid at room temperature, allotrope, different form of same element due to different arrangements of atoms, carbon, element contained in 80% of known compounds, aluminum, most abundant element (metal) in Earth's crust, iron/steel, most widely used metal, silicon, second most abundant element in earth's crust; found in glass and sand, properties, elements in families have similar __________, ore, natural material from which metals can be profitably extracted, alkali, most reactive metals, organic, compounds that contain carbon, metals, elements on left side of periodic table, different, each element in a period is in a __________ group, noble gas, family in group 18 on periodic table, families, vertical columns in the periodic table, two, number oe electrons transition elements have in outer energy level, halogens, family of "salt-producing" elements, hydrogen, odorless, tasteless, colorless gas; lightest of all elements, periods, horizontal rows on periodic table, transition, elements in groups 3-12 on periodic table, helium, gas element safe to use in balloons, nonmetals, elements on right side of periodic table, alloy, formed by metals; contains more than one element and has metallic properties

NTI Day #3

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