Chemistry Crossword Puzzle

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Across
  1. 3. A chemical reaction that absorbs energy (heat) from its surroundings.
  2. 4. A chemical reaction that releases energy (heat) to its surroundings.
  3. 6. A mixture of two or more elements, where at least one is a metal (e.g., brass, steel).
  4. 7. State of matter where particles are tightly packed in a fixed, regular pattern and can only vibrate.
  5. 10. A physical property of metals that allows them to be drawn or stretched out into long, thin wires.
  6. 11. A substance with a pH value of less than 7.
  7. 12. A vertical column in the Periodic Table containing elements with similar chemical properties.
  8. 14. The process of a liquid changing into a gas at the surface, occurring at temperatures below its boiling point.
  9. 17. A measure of how easily and quickly a substance undergoes a chemical reaction.
  10. 18. A factor that increases the rate of reaction by giving particles more kinetic energy, leading to more frequent and successful collisions.
  11. 20. A soluble base with a pH value greater than 7.
  12. 22. A substance made of two or more different elements chemically bonded together.
  13. 23. The reaction between an acid and an alkali/base to produce salt and water.
  14. 24. A subatomic particle found in the nucleus of an atom that has no electrical charge.
  15. 25. Two or more substances that are mixed together but not chemically joined.
  16. 26. A material (usually a metal) that allows electricity or heat to flow through it easily.
Down
  1. 1. A positively charged subatomic particle found in the nucleus of an atom.
  2. 2. The tiny, dense center of an atom containing protons and neutrons.
  3. 5. A negatively charged subatomic particle that orbits the nucleus of an atom.
  4. 8. A chemical substance that changes color to show whether a solution is acidic or alkaline.
  5. 9. The change of state from a gas to a liquid when energy is removed (cooling).
  6. 11. The smallest unit of an element that cannot be broken down by chemical means.
  7. 13. State of matter where particles are far apart, move rapidly in all directions, and easily fill any container.
  8. 15. A substance that speeds up a chemical reaction without being used up or permanently changed in the process.
  9. 16. A horizontal row in the Periodic Table.
  10. 19. A pure substance made of only one type of atom.
  11. 21. The event where two or more reactant particles crash into each other, which is required for a reaction to occur.