Across
- 7. An atom with a different number of neutrons than number of protons
- 9. An isotope where because the number of neutrons is uneven to the number of protons, radiation is released from the nucleus
- 10. The relative mass of an element including protons neutrons and electrons
- 11. The elements placed in Group 2 on the periodic table. Extremely reactive, are light and are solids at SATP
- 12. Negatively charged sub-atomic particle found in the energy levels surrounding the nucleus of an atom
- 14. The number of protons located in the center of the nucleus
- 17. 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.
- 21. The path around the nucleus in which electrons move
- 23. A sharing of electrons of chemicals with opposite charges
- 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.
- 26. Positively charged sub-atomic particle found in the nucleus.
- 27. In the center of an atom composed of protons and neutrons
- 28. When electrons are at their lowest possible energy level
- 29. An area surrounding the nucleus of an atom where electrons can move freely
Down
- 1. The elements placed in Group 1 on the periodic table. React intensely with water, usually a silver sort of colour and soft
- 2. The action of electrons moving between different energy levels
- 3. Patterning coloured lines that are displayed when light is shot through a prism. The colours represent the wavelengths.
- 4. A weak bonding through electrons of molecules
- 5. The electrons present on the most outer octet shell of an atom
- 6. The horizontal rows on the periodic table which are placed in relation to the number of energy levels an element has
- 8. A covalent bond where electrons are inequality shared between two or more non-metals
- 13. A sharing of electrons between two or more non-metals
- 15. Uncharged sub-atomic particle found in the nucleus
- 16. 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.
- 18. 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
- 19. The elements placed in Group 17 on the periodic table. Highly reactive, not good conductors of electricity and are not lustrous.
- 20. 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.
- 22. Where electrons have jumped up to a different level than where they began
- 24. The vertical columns on the periodic table which are placed in relation to the number of valence electrons present on an element