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CHEM 121 2026 MOLE CONCEPT AND CALCULATIONS REVIEW PACK.pdf

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CHEM 121 2026 MOLE CONCEPT AND CALCULATIONS REVIEW PACK.pdf

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CHEM 121 2026
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CHEM 121 2026

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CHEM 121 2026 MOLE CONCEPT AND
CALCULATIONS REVIEW PACK


◉What is the atomic number in Sb? Answer: 51


◉What is the mass number in Sb? Answer: 121


◉What are some words to describe a metal? Answer: malleable,
ductile, lustrous, great thermal and electrical conductors


◉What are some words to describe nonmetals? Answer: brittle, dull,
poor thermal and electrical conductors


◉Rows in a periodic table are called? Answer: periods


◉Columns in a periodic table are called? Answer: groups


◉A compound is molecular when... Answer: all nonmetals


◉A compound is ionic when... Answer: nonmetals & metals

, ◉Sand is... Answer: heterogeneous mixture


◉A picture of Kool-Aid is... Answer: homogeneous mixture


◉A block of sodium is... Answer: pure substance, element


◉Temperature of an ice cube... physical or chemical? Answer:
physical


◉Burning of a cardboard box... physical or chemical? Answer:
chemical


◉The density of hydrogen gas... physical or chemical? Answer:
physical


◉Butter is... Answer: heterogenous mixture


◉A slice of bread is... Answer: homogeneous mixture


◉a millimeter is... Answer: 1x10^-3 m


◉a picometer is... Answer: 1x10^-12 m
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