Stage 1 Chem - Term 1 Review

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Across
  1. 6. Energy required to completely remove an electron from a gaseous atom or ion.
  2. 7. A tabular arrangement of the chemical elements ordered by their atomic number.
  3. 8. Materials that are characterized by their tiny size, typically between 1 and 100 nanometres.
  4. 11. The standard scientific unit used for measuring large quantities of very small entities like atoms or molecules.
  5. 15. The specific arrangement of electrons in the energy levels and subshells of an atom.
  6. 17. Surname of the physicist who developed an atomic model featuring electrons orbiting a central nucleus in fixed energy levels.
  7. 18. Type of bonding characterised by a "sea" of delocalised electrons surrounding positive nuclei.
Down
  1. 1. The unique set of coloured lines produced when an element's excited electrons fall back to lower energy levels.
  2. 2. The outermost shell of an atom, containing the electrons involved in bonding.
  3. 3. A type of chemical bond that involves the sharing of electron pairs between non-metal atoms.
  4. 4. The measure of an atom's ability to attract shared electrons to itself in a chemical bond.
  5. 5. MASS The mass in grams of one mole of a specific chemical substance.
  6. 9. Number of protons in the nucleus of an atom.
  7. 10. The continuous 3D arrangement of atoms, ions, or molecules in a crystalline solid.
  8. 12. Different physical forms of the same element in the same physical state (e.g., diamond and graphite for carbon).
  9. 13. Atoms of the same element that have the same number of protons but a different number of neutrons.
  10. 14. A negatively charged ion formed when an atom gains electrons.
  11. 16. A negatively charged subatomic particle.