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IAPS Unit B #2

Elements, Compounds, Chemical Formulas

TermDefinition
Element Symbol It consists of 1 or 2 letters. The first letter is always capitalized.
Molecule two or more atoms put together by chemical bonds.
Compound (in terms of atoms) More than one type of element put together.
Chemical formula a shorthand way to identify the kind and number of atoms that make up a compound.
Chemical equation another kind of model for a chemical reaction; reactants and products separated by an arrow.
Reactants They are on the LEFT side of the chemical equation.
Products They are listed on the right side of the chemical equation.
Scientific Theory a well-tested, in-depth explanation for a wide range of observations or experimental results.
Scientific Law a description of an observed event or a concept.
Endothermic reaction a reaction that absorbs energy; the reaction may get cooler in temperature.
Exothermic reaction a reaction that releases energy, usually in the form of heat and light. The reaction will get hotter in temperature.
pH scale a measure of how acidic or basic a substance is. It runs from 0 – 14, with the low numbers representing acidic substances, and the higher numbers representing basic substances.
Acidic the higher the concentration of acid in a solution; the lower the pH number.
Replication when your investigation can be performed by another scientist with the same results.
Repetition when you test your experiment repeatedly through trials.
Empirical evidence data acquired by observation and experimentation.
Created by: user-1913463
 

 



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