Across
- 3. the variable in an experiment that the scientist changes
- 5. the state of matter with no defined shape or volume
- 8. The scientist credited for discovering the nucleus
- 10. The ability of an element to attract electrons in a bond
- 13. physical property that is independent of amount of material
- 15. VSEPR shape of water
- 17. VSEPR shape with three total atoms, and no lone pairs on central
- 19. the time it takes for half of the atoms of radioactive material go through decay
- 20. completed the oil drop experiment to calculate the charge and mass of an electron
- 21. Considered the father of the periodic table
- 24. a helium nucleus is known as an _____ particle
- 25. as the wavelength of a wave ______ the energy decreases
Down
- 1. part of a nuclear power plant that slow the fission chain reaction called the ______ rods
- 2. calculated by taking the mass of an object divided by the volume
- 4. gases elements with a very high ionization energy and zero electronegativity
- 6. The number of protons is known as the (blank) number
- 7. a change in matter that does not change the identity of the substance
- 9. the mass number is calculated by adding the number of protons and ______ together
- 11. energy required to remove an electron from an atom is called the ______ energy
- 12. a well developed explanation that has been tested many times by many experiments and has shown to be true
- 14. VSEPR shape where the central atom is bonded to 4 other atoms
- 16. the number of valence electrons in the halogens
- 18. type of nuclear radiation that is not a particle, but a wave of energy
- 22. the variable in an experiment that changes as a result
- 23. a temporary explanation of an observation that needs investigated