Across
- 2. the smallest whole unit of matter
- 3. the positively charged part of an atom; found in the nucleus
- 4. Name the name of the element
- 7. anything that has mass and takes up space
- 8. how much matter an object is made up of
- 9. the center of an atom
- 10. the negatively charged part of an atom; found orbiting the nucleus
Down
- 1. Symbol the letter(s) that represent the element
- 2. Number the number of protons which is equal to the number of electrons
- 5. a substance made of just one type of atom which cannot be broken down or changed into another substance
- 6. Mass the number of protons plus neutrons