Across
- 1. a form of matter that has its own volume and takes the shape of its container
- 3. a subatomic particle carrying a positive charge of 1+
- 5. a form of matter that has its own volume and shape
- 8. ______ number, high-energy radiation that possesses no mass
- 10. a subatomic particle with a mass nearly equal to that of a proton, but that has no electrical charge
- 11. __________ mixture, a mixture with distinct components, chocolate chip cookies for example
- 14. tiny, dense, centrally located region within the atom that contains all of an atom’s positive charge and virtually all of its mass
- 15. ____ number, the sum of the number of protons and neutrons in the nucleus
- 17. ____ particle, a fast moving electron with a 1− charge
- 18. atoms with the same number of protons but different numbers of neutrons
- 19. ______mass, the weighted average of mass of the isotopes of an element
- 20. a form of matter that fills the volume and shape of its container
Down
- 2. a ratio that compares the mass of an object to its volume
- 4. a pure substance that cannot be separated into simpler substances
- 6. how close a measured value is to an accepted value
- 7. __________ mixture, a solution, air for example
- 9. how close a series of measurements are to one another
- 12. negatively charged particles that are part of all forms of matter
- 13. _____ ray, high-energy radiation that possesses no mass and no charge
- 16. a combination of two or more elements that are chemically combined
- 19. _____ particle, a particle with two protons and two neutrons with a 2+ charge