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Matter : Anything that has mass and takes up space, or volume.

Matter : Anything that has mass and takes up space, or volume. Chemical Reactions. H 2 + Cl 2  2 HCl. Use a chemical formula to determine which elements form a compound. Use the formula to find the elements present in the molecule and the number of atoms of each element.

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Matter : Anything that has mass and takes up space, or volume.

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  1. Matter: Anything that has mass and takes up space, or volume.

  2. Chemical Reactions H2 + Cl2  2 HCl

  3. Use a chemical formula to determine which elements form a compound. • Use the formula to find the elements present in the molecule and the number of atoms of each element. KEY WORDS Chemical formula Subscript

  4. Chemical Reaction: A movement of electrons between combiningatoms that results in the formation of a NEWsubstance. Type 1 - Elements combine with each other. Type 2 - Molecules react together. Type 3 - Compounds are broken down into atoms. All reactions result in a new substance with different properties than before.

  5. 1. 2. 3.

  6. The Law of Conservation of Matter: In any chemical reaction matter cannot be created or destroyed. Atoms will rearrangeto form new compounds, but thenumberandtypeof atoms will not change duringthe reaction.

  7. 1000 kg 1000 kg

  8. O O H H H H Chemical formula - shows the type and amount of each atom present in acompound. + subscript

  9. O O O H H H H H H 3 H2O 6 atoms (3 x 2) of hydrogen and 3 atoms of oxygen form 3 molecules of water.

  10. 1 3 6 5 4

  11. All atoms present before a chemical reaction must be present after. (Law of Conservation of Matter) • Chemicalformula represents the type and amount of elements that make up the compound • AlCl3 – show 1 atom of aluminum and 3 atoms of chlorine combine to form 1 compound.

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