Across
- 3. Elements in the same group have similar ____
- 4. chart of elements arranged according to their properties
- 6. the number of protons in the nucleus of each atom's nucleus
- 7. a row in the periodic table
- 8. the letter you find in the periodic table, indicates the element's ____
Down
- 1. a column in the periodic table
- 2. what identifies the atomic number of an element
- 5. shows chemical symbol, atomic number, and atomic mass