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PS OGT PRACTICE

more chemistry

QuestionAnswer
Physical Properties a substance’s color, odor, density, melting point and boiling point, ductility, and conductivity.
Chemical Properties the ability of a substance to reach with other substances.
Periodic Table a chart of elements arranged by their atomic number- the number of protons. helps to predict how atoms of the different elements will combine.
Solids atoms, ions, and molecules are locked atoms, ions, and molecules are locked into fixed positions, giving the substance a fixed volume and shape.
Liquids when energy is transferred to a substance, its particles start to move around, melting the solid into a liquid. The temperature
Gas If more heat is applied to a liquid, its particles will move more rapidly, breaking all connections and turning into a gas. The temperature at which liquid turns into a gas is its boiling point.
Acid a special type of compound that forms hydrogen ions when dissolved in water. Acids are tart or sour. Acids have a pH value of less than 7
Base a special type of compound that forms hydroxide ions in water. Bases are slippery and taste bitter. Bases have a pH value of more than 7.
pH levels scientists use a scale of 0-14 to indicate pH values; Neutral solutions have a pH value of 7.
Acid/base reactions an acid combines with a base to produce water and salt.
Created by: Ruth.Miller
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