Across
- 3. atoms with the same number of protons and diffrent numbers of neutrons
- 5. positively charged particle
- 8. the number of protons in the nucleus of an atom
- 9. The basic paricle from which all elements are made
Down
- 1. An idea that has been studied and investigated and is supported by a vast and diverse of evidence
- 2. The sum of protons and neutrons in the nucleus of an atom
- 4. atoms that contain negatively charged particle
- 6. particle exists un the nucleus of atoms
- 7. dense center is called