Atomic Structure Crossword

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Across
  1. 4. An area surrounding the nucleus of an atom where electrons can move freely
  2. 7. The relative mass of an element including protons neutrons and electrons
  3. 9. An isotope where because the number of neutrons is uneven to the number of protons, radiation is released from the nucleus
  4. 12. The elements placed in Group 2 on the periodic table. Extremely reactive, are light and are solids at SATP
  5. 14. Negatively charged sub-atomic particle found in the energy levels surrounding the nucleus of an atom
  6. 15. The elements placed in Groups 3-12 on the periodic table. Have high melting and points, are hard metals and are good conductors of electricity.
  7. 17. The elements placed in Group 1 on the periodic table. React intensely with water, usually a silver sort of colour and soft
  8. 18. The horizontal rows on the periodic table which are placed in relation to the number of energy levels an element has
  9. 21. The elements placed in Group 18 on the periodic table. Are stable with a full valence shell, therefore are highly unreactive, have low boiling and melting points and at gases at SATP.
  10. 22. The number of protons located in the center of the nucleus
  11. 24. A weak bonding through electrons of molecules
  12. 27. When electrons are at their lowest possible energy level
  13. 28. Positively charged sub-atomic particle found in the nucleus.
  14. 29. The vertical columns on the periodic table which are placed in relation to the number of valence electrons present on an element
Down
  1. 1. In the center of an atom composed of protons and neutrons
  2. 2. A charged atom with a different number of electrons than protons. Atom has either lost or gained electrons on it's valence shell to try to become stable and ultimately became this.
  3. 3. The path around the nucleus in which electrons move
  4. 5. Where electrons have jumped up to a different level than where they began
  5. 6. An atom with a different number of neutrons than number of protons
  6. 8. The electrons present on the most outer octet shell of an atom
  7. 10. A covalent bond where electrons are inequality shared between two or more non-metals
  8. 11. Patterning coloured lines that are displayed when light is shot through a prism. The colours represent the wavelengths.
  9. 13. A sharing of electrons between two or more non-metals
  10. 16. A theory continuously shaped over generations most recently being drastically changed by Niels Bohr who proposed that elements have energy levels and how electrons move into other energy levels while releasing energy
  11. 19. Uncharged sub-atomic particle found in the nucleus
  12. 20. A sharing of electrons of chemicals with opposite charges
  13. 23. The action of electrons moving between different energy levels
  14. 25. The things that are put into the line spectrum and are formed when electrons move from excited state to ground state by moving down levels.
  15. 26. The elements placed in Group 17 on the periodic table. Highly reactive, not good conductors of electricity and are not lustrous.