Chemistry Unit Review

Edit Answers
12345678910111213141516171819
Across
  1. 4. A group of two or more atoms held together by chemical bonds and functioning as a single unit.
  2. 5. equation A symbolic representation of a chemical reaction, with reactants on the left side and products on the right side.
  3. 6. A substance made up of two or more different elements chemically combined in a fixed ratio.
  4. 9. A change in which one or more substances are transformed into new substances with different chemical properties.
  5. 10. A measure of the acidity or basicity of a solution, ranging from 0 to 14, with 7 being neutral, below 7 being acidic, and above 7 being basic.
  6. 11. A substance that is dissolved in a solvent, often the component that is present in lesser quantity in a solution.
  7. 12. The basic building block of matter, consisting of a nucleus containing protons and neutrons, with electrons orbiting around it.
  8. 13. The new substances formed as a result of a chemical reaction.
  9. 16. formula A representation of a substance using chemical symbols and numbers to indicate the types and number of atoms present.
  10. 17. The act of adjusting the coefficients in a chemical equation to ensure that the number of atoms of each element is equal on both sides of the equation.
  11. 18. The ability of a substance to dissolve in a given solvent at a given temperature and pressure.
  12. 19. A substance capable of dissolving other substances, often the component that is present in greater quantity in a solution.
Down
  1. 1. A change in the physical properties of a substance, such as size, shape, or state, without a change in its chemical composition.
  2. 2. A pure substance composed of only one type of atom, distinguished by its atomic number on the periodic table.
  3. 3. table A tabular arrangement of elements in order of increasing atomic number, organized based on similar chemical properties.
  4. 7. The principle that states that the mass of substances involved in a chemical reaction remains constant; mass is neither created nor destroyed, only rearranged.
  5. 8. A substance that accepts hydrogen ions (H+) or donates electrons, characterized by a bitter taste and the ability to turn red litmus paper blue.
  6. 9. The process in which one or more substances undergo a chemical change, resulting in the formation of new substances with different properties.
  7. 14. A substance that participates in a chemical reaction and undergoes change.
  8. 15. A substance that donates hydrogen ions (H+) or accepts electrons, characterized by a sour taste and the ability to turn blue litmus paper red.