Unit 1 Atomic Structure

2. The outtermost electrons in an atom. The 'bonding' electrons.
3. A horizontal row of elements in the periodic table
5. A chart of the elements showing the repeating pattern of their properties
6. Number of protons and neutrons
8. A subatomic particle that has a negative charge
14. Number of protons in an atom
16. The electron filling rule that electrons fill the lowest energy level first
17. The 'ring' from the bohr model, the principal quantum number in the quantum model.
19. the arrangement of electrons in an atom
22. describes the motions of subatomic particles
23. Area around the nucleus. Electrons are found here. Volume of the atom
25. The shape an electrons moves in around the nucleus

1. A model showing only the valence electrons in an atom
4. A subatomic particle that has a positive charge and that is found in the nucleus of an atom
7. an element in group 2 of the periodic table
9. Group 18 of the periodic table
10. A subatomic particle that has no charge and that is found in the nucleus of an atom
11. Vertical column in the periodic table
12. The electron filling rule that each orbital gets 2 electrons with opposite spin
13. an element in group 1 of the periodic table
15. Group 17
18. model of an atom that shows electrons in circular orbits around the nucleus
20. The electron filling rule that electrons fill orbitals of the same energy will have the maximum number of electrons with the same spin
21. Center of an atom. Protons and neutrons found here. Mass of the atom.
24. Smallest unit of matter that retains all of the chemical properties of an element.