Chemistry Test

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Across
  1. 4. A diagram showing valence electrons around an element’s symbol.
  2. 5. A substance formed when two or more elements chemically bond in fixed proportions.
  3. 8. A group of atoms bonded together.
  4. 9. Invented the period table.
  5. 10. Examples: Lithium (Li), Sodium (Na), Potassium (K).
  6. 12. Examples: Lanthanum (La), Europium (Eu), Neodymium (Nd).
  7. 18. The tiniest studied particle that makes up protons, neutrons, and electrons.
  8. 21. The attribute of being able to be drawn out into a thin wire.
  9. 24. Examples: Carbon (C), Nitrogen (N), Oxygen (O).
  10. 25. The mass of a single atom, determined by adding its protons and neutrons.
  11. 26. The number of protons in the nucleus, which identifies a chemical element.
  12. 29. Vertical rows on the periodic table.
  13. 30. Electrons in the outermost shell of an atom.
  14. 33. A mixture of 2 or more metals.
  15. 34. Examples: Beryllium (Be), Magnesium (Mg), Calcium (Ca).
  16. 35. A strong attraction between two oppositely charged ions.
  17. 37. When you lose electrons during a chemical reaction.
  18. 38. Positive particle in the nucleus.
  19. 39. The smallest element.
Down
  1. 1. Neutral particle in the nucleus.
  2. 2. An arrangement of the chemical elements.
  3. 3. The attribute of being able to be pressed out of shape without breaking or cracking.
  4. 6. Examples: Silicon (Si), Arsenic (As), Antimony (Sb).
  5. 7. The first element in the period table.
  6. 11. Examples: Helium (He), Neon (Ne), Argon (Ar).
  7. 13. Uranium (U), Plutonium (Pu), Thorium (Th).
  8. 14. Examples: Fluorine (F), Chlorine (Cl), Bromine (Br).
  9. 15. The attraction or repulsion between two charged particles.
  10. 16. Horizontal columns on the periodic table.
  11. 17. Examples: Iron (Fe), Copper (Cu), Zinc (Zn).
  12. 19. The dense center of an atom containing protons and neutrons.
  13. 20. The mass of a substance divided by its volume.
  14. 22. an atom or group of atoms that has a positive or negative electrical charge because of uneven protons/neutrons.
  15. 23. A state of matter where atoms lose electrons and become ionized, often called the 4th state.
  16. 27. Atoms of the same element with different numbers of neutrons.
  17. 28. Examples: Aluminum (Al), Tin (Sn), Lead (Pb).
  18. 31. Negative particle that orbits the nucleus.
  19. 32. The basis of all life.
  20. 36. A particle of light energy.