Across
- 1. A force that produces magnetic and electric fields
- 4. A force that occurs when there's some kind of change in the nucleus of an atom
- 5. These negatively charged particles keep things from touching because all atoms are surrounded by them and like charges repel each other
- 7. A neutron spontaneously converts into a proton, an electron, and a nutrino
- 8. Two or more atoms in a specific ratio
- 10. The number of protons; how elements are arranged on the periodic table
- 12. A push or a pull
- 14. A group of atoms
- 15. An average of all the isotopes of a particular element
- 17. An alpha particle is ejected from the nucleus
- 19. One or two letters that represent each element on the periodic table
- 20. Everything with mass exerts a gravitational force on everything else that has mass
- 21. A mixture where the different parts can be separated
Down
- 2. Gravitational force is created when objects with mass warp space and time around themselves
- 3. A mixture where the different parts cannot be separated
- 6. The range, strength, and direction of a force
- 9. A force that holds protons together in an atom's nucleus
- 11. Formed when atoms combine in an array
- 13. A force between two objects
- 16. Two substances mixed together with no chemical reaction
- 18. Another name for a homogenous mixture
