Across
- 2. Number/the sum of the number of nucleons in an atom
- 3. Number/the number of protons in the nucleus of an atom of an element
- 8. nucleus is a membrane bound structure that contains the cell's info and controls the cell's growth and reproduction.
- 10. of Conservation of Mass/any closed system the amount of mass will remain constant over time
- 11. Life/quickly unstable atoms undergo, or how long stable atoms survive
- 16. and mixtures which are in a single phase
- 18. that has mass and takes up space
- 19. electron is a negatively charged component of an atom
- 20. with a positive charge that is in the nucleus of an atom
- 21. atoms with the same number of protons but different numbers of neutrons
- 23. Sphere/first atomic model
- 24. greek term that means undivided also refer to atom
- 25. the basic unit of a chemical element
Down
- 1. emission of radiation, either directly from unstable atomic nuclei
- 4. is one which has a non-uniform composition.
- 5. Pudding Model/model of atomic structure
- 6. Model/model of the atom
- 7. compound is a substance formed when two or more chemical elements are chemically bonded together
- 9. Cloud Model/locations of electrons in an atom
- 12. Model/model of the atom
- 13. Substance/any material with a definite chemical composition
- 14. or more substances which have been combined such that each substance retains its own chemical
- 15. An atom or a group of atoms that carries an electric charge
- 17. negatively charged ion
- 22. Any positively charged atom or group of atoms