Lesson 5: The Atomic Theory
Across
- 7. they are negatively charged
- 8. contributed to the development of the atomic theory
- 9. that is where most of the mass of an atom is
- 10. the basic unit of an element
- 12. electrons move around the nucleus on
- 13. tells us how many protons and electrons are present in the element
- 15. elements can be combined to make these
- 17. the periodic table of elements shows the names and abbreviations for each....
- 18. bonding between non-metal
Down
- 1. he did an experiment where he shot beams of radiation through gold foil
- 2. they are positively charged
- 3. believed in ideas without experimentation
- 4. the center of the atom
- 5. the production of insulin molecules to treat diabetes was made possible by the work of....
- 6. believed all matter was made of atoms
- 11. anything that has mass and takes up space
- 14. these scientists are able to replicate naturally occurring molecules to help people with deficiencies
- 16. they carry no charge