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Across 3. An _____ can contain two electrons with paired spins and is often associated with a specific region of an atom. 5. Force of attraction between oppositely charged particles. 8. These are chemical bonds that occur between molecules. 10. A type of intermolecular forces which occurs from the polarization of molecules, there are two types: dipole-dipole forces and London dispersion forces. 13. It is the same as Lewis Structural Diagrams. The chemical symbol for the atom is surrounded by a number of dots corresponding to the number of valence electrons. 14. There is an unequal sharing of electrons. _____ _____ is when the electrons are not distributed symmetrically and thus does have an abundance of charges at the opposite sides. 17. A metal atom replaces another similarly sized atom in the structure. 18. Chemical compounds with an unequally distributed electrons, such as the water molecule. The opposite charges attract each other.... 21. These are chemical bonds that occur within a molecule. 22. A rule which states that an element's valence shell is full and most stable when it contains eight electrons. 25. The atom having a positive or negative charge. 27. The electrons that are in the outer shell. 30. A crystal consisting of ions bound together by their electronegativity. 32. The study of the spatial arrangements of atoms in molecules and compounds. 33. An atom has the same number of protons, but different numbers of neutrons. 34. Rules which is designed to show the shapes of individual molecules. The rule uses a Lewis structure, which shows all of the bonds within the molecule and the locations of lone pairs of electrons to predict the 3D shape of the molecule 35. Used to describe the gain of electrons by a molecule, atom or ion. 36. A chemical bond formed by electronegativity attraction between oppositely charged ions

Down 1. Two electrons that form a pair of electrons in the valance shell of two atoms, used to form a bond between them. 2. A form of Van der Waals force, the random movements of electrons create short intermediate states of charged atoms. 4. Model which states there is a state of lowest energy for the electron, that there is a maximum energy, beyond which the electron is no longer bound to the nucleus and that within these two energies the electron can only exist in certain energy levels. 6. Same as the Electron Dot Diagram, which shows electrons in the valance shell. 7. A crystal with covalent bonds between all of the atoms in the crystal. 9. Two types of metal atom mixed together, one type of atom is significantly smaller than the other type of atom. 11. the ability of an atom to inductively pull electrons towards itself 12. Non-polar molecule is when the electrons are distributed more symmetrically and does not have an abundance of charges at the opposite sides. 15. It is a formula that shows how atoms in a compound are attached to one another. 16. Used to describe the loss of electrons by a molecule, atom or ion. 19. A bond that is a special type of a dipole-dipole bond, which exists between a highly electronegative atoms and hydrogen atoms. 20. Same as Bohr Model this model shows the electrons fixed energy levels. 23. A chemical bond between two atoms that is created by sharing two electrons. The difference in electronegativity is less than 1.7. 24. Pair of electrons in the valance shell, it is not bonding site. 26. An atom or group of atoms that carries a positive or negative charge as a result of having lost or gained one or more electrons. 28. A chemical bond in which shared electrons move freely among the atoms. 29. Atom with most boding sites, usually in the middle of a structural formula. 31. The representation of a compound by two or more basic structures in which the valence electrons are rearranged to give structures of similar probability