Across
- 5. a supposition or a system of ideas intended to explain something, especially one based on general principles independent of the thing to be explained.
- 8. state or power of being reactive or the degree to which a thing is reactive.noble gasses a 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).
- 9. mark or character used as a conventional representation of an object, function, or process, e.g. the letter or letters standing for a chemical element or a character in musical notation.
- 12. a 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.
- 13. a length or portion of time.
- 16. an element or substance that is not a metal.
- 18. a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.
- 19. able to be deformed without losing toughness; pliable, not brittle.
- 21. conductivity he degree to which a specified material conducts electricity, calculated as the ratio of the current density in the material to the electric field that causes the flow of current.
- 22. mass the mass of an atom of a chemical element expressed in atomic mass units.
- 23. a metal) able to be drawn out into a thin wire.
Down
- 1. chemical composition of the atmosphere"
- 2. relating to chemistry, or the interactions of substances as studied in chemistry.
- 3. (of a metal or other material) able to be hammered or pressed permanently out of shape without breaking or cracking.
- 4. 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.
- 6. is approximately equivalent to the number of protons and neutrons in the atom
- 7. a gentle sheen or soft glow, especially that of a partly reflective surface.
- 10. the process of corroding metal, stone, or other materials.
- 11. the strength and vitality required for sustained physical or mental activity.
- 14. 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.
- 15. bodies fall into four distinct groups"
- 17. an element (e.g. arsenic, antimony, or tin) whose properties are intermediate between those of metals and solid nonmetals or semiconductors.
- 20. a number of people or things that are located close together or are considered or classed together.
- 22. to be deformed without losing toughness; pliable, not brittle.