Across
- 3. stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign.
- 5. They are a source of nuclear energy
- 6. of a positively charged nucleus with electrons revolving around it in any of many possible circular orbits each corresponding to a distinct energy state.
- 9. positively charged central core of an atom, consisting of protons and neutrons and containing nearly all its mass.
- 10. a substance that flows freely but is of constant volume, having a consistency like that of water or oil.
- 12. mass-the mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the
- 15. measure of the amount of information on a storage medium (tape or disk)
- 16. (the mass number) or to the average number allowing for the relative abundances of different isotopes.
- 17. firm and stable in shape; not liquid or fluid.
- 18. Table- a table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure (and hence similar chemical properties) appear in vertical columns
- 19. a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.
Down
- 1. any substance composed of identical molecules consisting of atoms of two or more chemical elements.
- 2. number-the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.
- 4. subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen.
- 7. a part or aspect of something abstract
- 8. cloud - A group of electrons circulating around a nucleus or a molecule
- 11. substance or matter in a state in which it will expand freely to fill the whole of a container, having no fixed shape (unlike a solid) and no fixed volume (unlike a liquid).
- 13. the Father of the Periodic Table.
- 14. a coherent, typically large body of matter with no definite shape