Across
- 2. six elements in Group 17 of the periodic table
- 4. vertical column in the Periodic Table
- 7. a pure substance made up of only one kind of atom which can't be split up into two or more substance
- 9. a subatomic particle with a positive electrical charge
- 10. a particle of matter that uniquely defines a chemical element
- 12. imprecise term used to describe a chemical element that forms a simple substance having properties intermediate between those of a typical metal and a typical nonmetal
- 13. a negatively charged subatomic particle that can be either bound to an atom or free
Down
- 1. total number of protons and neutrons in an atom
- 3. the first element on the periodic table
- 5. subatomic particles found inside the nucleus of every atom,
- 6. a horizontal row of the periodic table,
- 8. GASES A gaseous chemical element that does not readily enter into chemical combination with other elements
- 10. the number of protons in the nucleus of an atom
- 11. The group 1 elements