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Fe iron

Fe iron. Co cobalt. Pb lead. K potassium. Ne neon. Au gold. C carbon. N nitrogen. Chemical Formula. H is the symbol for Hydrogen. O is the symbol for Oxygen. H 2 O. No subscript after oxygen means the molecule of water has only one atom of oxygen.

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Fe iron

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  1. Fe iron Co cobalt Pb lead K potassium Ne neon Au gold C carbon N nitrogen

  2. Chemical Formula His the symbol for Hydrogen Ois the symbol for Oxygen H2O No subscriptafter oxygen means the molecule of water has only one atom of oxygen. Thesubscriptmeans the molecule of water has two atoms of hydrogen

  3. Coefficient Molecule of Water 3 H2O The coefficient shows the number of molecules of the compound.

  4. Chemical Equation C O2 CO2 + One atom of carbon combines with two atoms of oxygen to produce one molecule of carbon dioxide.

  5. Parts of a Chemical Equation C O2 CO2 yields + or produces PRODUCTis the new substance or substances produced and are on the right side of the arrow. REACTANTS are the starting materialson the left side of the arrow.

  6. A plus sign (which mean combines or reacts with) separates the reactants. NaOH+HCl NaCl+H2O A plus sign separates products when there is more than one new substance produced.

  7. Law of Conservation of Mass States that mass (atoms) cannot be created nor destroyed in a chemical reaction. There must be the same number of atoms on each side of the equation.

  8. In a chemical reaction, the total mass of the materials formed is the same as the total mass of the starting materials.

  9. P O2 P4O10 4 5 + 4 atoms of P 4 atoms of P = 10 atoms of O 10 atoms of O balanced

  10. H+O2H2O H =1 atom H =2 atoms = O =2 atoms O =1 atom H+O2H2O 4 2 H =4atoms H =4 atom = O =2atoms O =2atoms

  11. Mg + O2 MgO 2 2 Mg = Mg = O = O = 1 2 1 2 2 1 2

  12. Ca + O2 CaO 2 2 Ca = Ca = O = O = 1 2 1 2 2 1 2

  13. N2 + H2 NH3 3 2 2 N = N = H = H = 2 1 2 6 6 3

  14. Cu2O + C  Cu+ CO2 2 4 1 Cu = Cu = O = O = C = C = 4 2 4 1 2 2 1 1

  15. H2O2 H2O+O2 2 2 4 H = H = O = O = 2 4 2 2 3 4 4

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