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Across 1. Group 1A 5. The ability of an atom of an element to attract electrons when the atom is in a compound. 8. Are none metals and are Group 7A. 9. Electons occupy the orbitals of the lowest energy first. 10. Are negatively charged subatomic particles. 11. The tiny central core of an atom and is composed of protons and neutrons. 12. The energy requiered to remove an electron of the protons in the nucleus. 14. Electrons occupy orbitals of the same energy in a way that makes the number of the electrons with the same spin direction as large as possible. 15. Is one half of the distance between the nuclei of two atoms of the same element when the atoms are joined. 16. Properties that are simular to those of metals and non metals

Down 2. The ways in which electrons are arranged in various obitals around the nuclei of atoms. 3. Are good conductors of heat and electric currrent. 4. Fixed energies kan electron can have. 6. An ion with a positive charge. 7. Often thought of as a region of space in which their is a high probability of finding and electron. 13. An ion with a negative charge.