Across
- 1. also known as a family. used to differentiate the type of elements ex) Metals, Metalloids, Nonmetals
- 5. horizontal rows in a periodic table. there are 7
- 6. Average total mass of the isotopes of the element
Down
- 2. a concept that helps identify someone or something
- 3. Chart showing all of the elements arranged according to the repeating pattern of their properties
- 4. letters to indicate the element
- 7. vertical rows in a periodic table. There are 18