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