Composition and Classification of Matter

123456789101112131415161718192021
Across
  1. 2. – The process of changing from liquid to gas.
  2. 4. – The smallest unit of matter that keeps the properties of an element.
  3. 9. – Atoms of the same element that have the same number of protons but different numbers of neutrons.
  4. 10. Number – The number of protons in an atom’s nucleus.
  5. 12. Theory – The idea that all matter is made of atoms.
  6. 14. – Matter with a fixed volume but no fixed shape (takes the shape of its container).
  7. 16. Substances – Matter made of only one kind of particle (like elements or compounds).
  8. 20. Mass – The total mass of an atom (protons + neutrons).
  9. 21. Mixture – A mixture where you can see the different parts (like sand and water).
Down
  1. 1. Bonds – Bonds where atoms share electrons.
  2. 3. – Matter with a fixed shape and volume.
  3. 5. Bonds – Forces that hold atoms together in compounds.
  4. 6. Bonds – A type of covalent bond where electrons are shared unequally, making one side slightly negative and the other slightly positive.
  5. 7. Mixture – A mixture that looks the same throughout (like salt water).
  6. 8. – Anything that has mass and takes up space.
  7. 11. – A combination of two or more substances that are not chemically bonded.
  8. 13. Bonds – Bonds formed when atoms transfer electrons, creating positive and negative ions that attract each other.
  9. 15. – Pure substances made of only one type of atom.
  10. 17. – Tiny, negatively charged particles that move around the nucleus of an atom.
  11. 18. – Matter with no fixed shape or volume (spreads out to fill a space).
  12. 19. – Atoms that gain or lose electrons, giving them a charge.