Across
- 4. a region of space around the nucleus where an electron is likely to be found
- 7. an electron that is in its highest occupied energy level of an atom
- 9. elements with properties that fall between those of metals and nonmetals
- 10. the sum of the number of protons and neutrons in the nucleus of an atom
- 12. a neutral subatomic particle that is found in the nucleus of an atom
- 14. elements that are poor conductors of heat and electric current
- 17. the possible energies that electrons in an atom can have
- 19. the arrangement of electrons in the orbitals of an atom
- 22. a visual model of the most likely locations for the electrons in an atom
- 24. the elements in Group 1A of the periodic table, not including hydrogen
- 25. a row in a periodic table of elements
- 26. elements that are good conductors of heat and electrical current
Down
- 1. a positively charged subatomic particle that is found in the nucleus of an atom
- 2. the elements in Group 7A of the periodic table
- 3. the elements in group 2A of the periodic table
- 5. atom of an element that has a number of neutrons different from that of other atoms of the same element
- 6. a state in which all the electrons in an atom have the lowest possible energies
- 8. the center of the atom which contains the protons and neutrons, in cells, structure that contains the cells genetic material(DNA and controls the cells activities
- 11. the pattern of repeating properties displayed by elements in the periodic table
- 13. one twelfth the mass of a carbon-12 atom
- 15. an arrangement of elements in columns, based on a set of properties that repeat from row to row
- 16. elements that form a bridge between elements on the left and right sides of the periodic table
- 18. the elements in group 8A of the periodic table
- 20. a unique number foread element that equals the number of protons in an atom of that element
- 21. a column of elements in a periodic table
- 23. negatively charged particle located outside the atomic nucleus