STUDY GUIDE 2026 TESTED QUESTIONS AND
PRACTICE SOLUTION GRADED A+
◉ evidence of chemical change.
Answer: color change, form a gas, formation of precipitate
(cloudy/gel, insoluble solid), energy change (endo/exo)
◉ Mixture vs. compound.
Answer: Mixtures are physically combined and compounds are
chemically combined.
◉ Pure substance.
Answer: have a fixed composition; always homogeneous; every
sample has the same characteristic properties and composition; all
elements and compounds
◉ group properties periodic table.
Answer: valence electrons, vertical, 18, similar characteristics
◉ Periods.
Answer: Horizontal rows on the periodic table, 7, energy level
,◉ Metal vs. nonmetal properties.
Answer: metal-luster, solid, malleable, good conductors, ductile
nonmetal-dull, liquid or gas or a brittle solid, poor conductors
◉ Noble gas properties.
Answer: Colorless, odorless, low reactivity, 8 valence electrons,
stable
◉ Nonmetals.
Answer: on the right side of the periodic table, most are gases at
room temperature, form anions
◉ Nonmental properties.
Answer: dull, liquid or gas or a brittle solid, poor conductors
metal properties
◉ distillation.
Answer: separating liquids using boiling point
◉ Filtering.
, Answer: Separating a solid and a liquid; the liquid passes through
the filter paper and the solid remains in the funnel
◉ evaporation.
Answer: A method to separate water and a dissolved solid
◉ chemical change.
Answer: Is an acid base reaction a physical or chemical change
◉ qualitative observation.
Answer: An observation that deals with characteristics that cannot
be expressed in numbers; physical; color, odor
◉ quanitative.
Answer: relating to, measuring, or measured by numbers, density,
length, volume
◉ observations.
Answer: Includes making measurementts and collecting data; use of
senses for info; record for a system
◉ scientific method.