Across
- 4. He created the periodic table (lastname)
- 7. This states that only two electrons occupy an orbital. No two electrons can be described by the same four quantum numbers. This is Pauli’s ___________ Principle
- 8. A group of atoms that has an electrical charge is a ___________ ion
- 10. elements of the same kind of atom but has a different atomic mass
- 11. Atoms that gain electrons
- 12. developed the idea of atoms
- 13. He formulated the Periodic Law (use lastname)
- 15. These are bonds formed between metals where the array of cations are held together by the strong attraction between cations and electrons.
- 16. Anything that has space, has mass and volume.
- 17. the chemical property of a radioactive element change as it gives off radiation.
- 20. These are electrons in the outermost main energy level and the electrons in the d orbital of the next inner main energy level
- 24. The energy change associated with an atom gaining an electron (1word)
- 27. Atoms that lose electrons
- 30. a type of radioactive radiation that is negatively charged which has a medium penetrating ability which can be stopped by heavy clothing
Down
- 1. a type of radioactive radiation in relation to rays which has the strongest penetrating ability which can be stopped by lead
- 2. ______ rule states that electrons must occupy orbital’s of the same energy (sublevel) singly before pairing occurs. This also means that the most stable arrangement of electrons on a sublevel is one with the greatest number of parallel spins.
- 3. two nuclei collide to form another nucleus, releasing great amount of energy is nuclear _______
- 5. The measure of the power of attraction
- 6. This type of covalent bond is formed when one atom is significantly more electronegative than the other
- 8. This law states that properties of elements are the periodic functions of their atomic no.
- 9. The energy required to remove an electron from the atom.
- 14. these behave like a stream of extremely tiny fast moving particles
- 18. building blocks of matter
- 19. The rule where 8 valence electrons are needed for nuclei to be stable.
- 21. He suggested that it is impossible to determine the exact location and the exact momentum of very small particles like an electron simultaneously
- 22. This bonding is formed by a shared pair of electrons between two atoms.
- 23. This bond is formed when electrons are transferred.
- 25. This principle describes the hypothetical process in which electrons are imagined as entering the atomic orbital one by one.
- 26. the splitting of the nucleus releasing great energy is nuclear __________
- 28. a type of radioactive radiation that is positively charged which has the least penetrating ability which can be stopped by paper
- 29. Atoms that lose or gains electrons are called _____.