Across
- 2. located on the left side of the periodic table
- 3. vertical column in the periodic table
- 7. a chemical substance that is made up of two or more diffrent kinds of atoms bonded together
- 8. the particle known as the building block of matter
Down
- 1. the groups of elements down
- 2. located in a diagonal line near the middle of the periodic table
- 4. horizontal row on the periodic table
- 5. the smallest particle of any pure element
- 6. smallest particle of a substance that makes up of two o more atoms