Year 8 Chemistry

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Across
  1. 3. A group of atoms bonded together, representing the smallest unit of a chemical compound that retains its chemical properties.
  2. 6. The property of a material that allows it to be easily deformed or shaped without breaking when subjected to pressure or compression.
  3. 8. The property of a material that allows it to be stretched or drawn into thin wires or threads without breaking.
  4. 10. The tendency of a material to break or shatter easily when subjected to stress or impact, without significant deformation.
  5. 11. A vertical column on the periodic table, consisting of elements with similar chemical properties due to the same number of electrons in their outermost energy level.
  6. 13. A subatomic particle found in the nucleus of an atom, carrying a positive electric charge (+1).
  7. 14. A horizontal row on the periodic table, indicating the number of electron energy levels in the atoms of the elements within that row.
  8. 17. The measure of a material's resistance to being scratched or indented. It describes how well a substance can withstand abrasion.
  9. 19. A subatomic particle that orbits the nucleus of an atom and carries a negative electric charge (-1).
  10. 20. The ability of a material to conduct or transfer heat energy when exposed to a temperature difference.
Down
  1. 1. Referring to elements or compounds consisting of single atoms, not bonded to each other.
  2. 2. The measure of the mass of a substance per unit volume. It determines how tightly packed the particles are within a material.
  3. 4. The visual property that describes the appearance of an object due to the wavelengths of light it reflects or emits.
  4. 5. The temperature at which a liquid substance changes into a vapor or gas state.
  5. 7. The visual property that describes the way light interacts with the surface of a material, giving it a shiny or dull appearance.
  6. 9. A subatomic particle found in the nucleus of an atom, having no electric charge (neutral).
  7. 12. A substance formed when two or more different elements chemically combine in fixed proportions to create a new substance with distinct properties.
  8. 15. A pure substance composed of only one type of atom, characterized by its atomic number and represented on the periodic table.
  9. 16. The temperature at which a solid substance changes into a liquid state.
  10. 18. A regular, repeating three-dimensional pattern or arrangement of atoms, ions, or molecules in a crystal or solid structure.