Crossword 9-4 (Chemicals)

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  1. 3. = a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.
  2. 5. = a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.
  3. 6. = a set of chemical symbols showing the elements present in a compound and their relative proportions, and in some cases the structure of the compound.
  4. 12. = any of the elements beryllium, magnesium, calcium, strontium, barium, and radium, occupying Group IIA (2) of the periodic table. They are reactive, electropositive, divalent metals, and form basic oxides which react with water to form comparatively insoluble hydroxides.
  5. 13. = any of the elements fluorine, chlorine, bromine, iodine, and astatine, occupying group VIIA (17) of the periodic table. They are reactive nonmetallic elements that form strongly acidic compounds with hydrogen from which simple salts can be made.
  6. 14. = firm and stable in shape; not liquid or fluid.
Down
  1. 1. = any of the elements lithium, sodium, potassium, rubidium, cesium, and francium, occupying Group IA (1) of the periodic table. They are very reactive, electropositive, monovalent metals forming strongly alkaline hydroxides.
  2. 2. = any of the gaseous elements helium, neon, argon, krypton, xenon, and radon, occupying Group 0 (18) of the periodic table. They were long believed to be totally unreactive but compounds of xenon, krypton, and radon are now known.
  3. 4. = relating to chemistry, or the interactions of substances as studied in chemistry.
  4. 7. = the positively charged central core of an atom, consisting of protons and neutrons and containing nearly all its mass.
  5. 8. = the basic unit of a chemical element.
  6. 9. = a 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.
  7. 10. = an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
  8. 11. = 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. 15. = a substance that flows freely but is of constant volume, having a consistency like that of water or oil.