Across
- 4. Row in the periodic table
- 7. Atom with same protons but different neutrons
- 9. Electron ______________ Arrangement of electrons in shells
- 12. Negatively charged particle orbiting the nucleus
- 13. _________Diagram is a visual representation of electron shells
- 14. Outermost electron shell
- 16. Element that gains electrons to form anions
- 17. ________number is the total number of protons and neutrons
- 18. Positively charged ion
Down
- 1. Chart organizing elements by atomic number
- 2. A basic unit of matter
- 3. Number of protons in an atom
- 4. Positively charged particle in the nucleus
- 5. Neutral particle in the nucleus
- 6. Column in the periodic table
- 8. Element that loses electrons to form cations
- 10. Center of an atom containing protons and neutrons
- 11. Negatively charged ion
- 15. Pure substance made of one type of atom
- 19. Atom with a charge due to loss or gain of electrons