Unit 6B Vocab

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Across
  1. 4. Result of a chemical reaction.
  2. 7. Symbolic representation of a chemical reaction in the form of symbols and formulas.
  3. 8. A way of expressing information about the proportions of atoms that make up a particular chemical compound.
  4. 10. A group of odorless, colorless, monatomic gases with very low chemical reactivity.
  5. 11. A substance that takes part in and undergoes change during a reaction.
Down
  1. 1. Occurs when objects or substances are changed through the physical form of a composition, but not through its chemical composition.
  2. 2. Electrons from the outer shell of an atom that can participate in forming chemical bonds with other atoms.
  3. 3. States that for any system closed to all transfers of matter and energy, the mass of the system must remain constant, as system mass cannot change quantity if it is not added or removed.
  4. 5. Occurs when a substance combines with another to form a new substance, called synthesis, or, alternatively, decompose into two or more different substances.
  5. 6. A lasting attraction between atoms that enables the formation of chemical compounds.
  6. 9. A group of elements on the periodic table that are all found on the first column and are extremely reactive.