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,
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NTI Day #3
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Periodic Table
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