Across
- 5. The process of building a new atomic nuclei from pre-existing nucleons (protons and neutrons)
- 7. Subatomic particle with a negative electric charge
- 8. Basic unit of a chemical element
- 9. Species of atoms having the same number of protons in their atomic nuclei
- 13. Atom with a net electric charge due to the loss or gain of one or more electrons
- 16. Tendency of an element to attract a shared electron when bonded to another
- 17. A planet orbiting a star other than our Sun
- 18. The amount of light emitted by an object in a unit of time.
Down
- 1. Subatomic particle with a positive charge
- 2. Term used when discussing isotopes of more than one element
- 3. Unstable isotope transforming into a stable one or a series of unstable nuclei before a final stable nucleus
- 4. The gradual accumulation of mass, as by a planet forming from colliding particles in the solar nebula
- 6. A meteorite composed mostly of stony material, either primitive or differentiated
- 10. Atoms of the same element with different mass numbers
- 11. A form of hydrogen in which the nucleus of each atom consists of one proton and one neutron
- 12. Subatomic particle with no electric charge
- 14. Areas within atoms where there is a high probability to find an electron
- 15. 46% of the earths crust is made up of this element