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Unit 2 Learning
Unit 2 Learning Statements - Chemical Formulas & Reactions
Question | Answer |
---|---|
Chemical Formula | states the number of atoms of each element in a compound |
Periodic Table | shows the atomic symbol or abbreviation for each element |
Subscript | number written slightly lower after an atomic symbol and states the number of atoms for that element |
Atomic Symbol with No Subscript | states there is only one atom of the element |
Total Number of Atoms in a Molecule | Count the atoms of each element and add the numbers |
Reactants | found on the left side of the arrow in a chemical reaction |
Products | found on the right side of the arrow in a chemical reaction |
Evidence of a Chemical Reaction | *production of gas or bubbles *changes in temperature *production of a precipitate (solid formed) *color change *formation of a new substance *produces light |
Law of Conservation of Mass | in a chemical reaction , the mass of the reactants will equal the mass of the products |
Law of Conservation of Mass | in a chemical reaction, the number of atoms for the reactant side will equal the number of atoms on the product side |
Reactants | elements and compounds located on the right side of the arrow in a chemical reaction |
Products | elements and compounds located on the left side of the arrow in a chemical reaction |