Matter

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Across
  1. 2. with no charge (neutral)
  2. 4. of an atom are found orbiting the nucleus of the atom
  3. 6. 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).
  4. 8. a substance that flows freely but is of constant volume, having a consistency like that of water or oil.
  5. 10. positive charge
  6. 12. are the building blocks of matter and are in constant motion
  7. 13. an ionized gas consisting of positive ions and free electrons in proportions resulting in more or less no overall electric charge, typically at low pressures (as in the upper atmosphere and in fluorescent lamps) or at very high temperatures (as in stars and nuclear fusion reactors).
Down
  1. 1. a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.
  2. 3. a fixed luminous point in the night sky which is a large, remote incandescent body like the sun.
  3. 5. firm and stable in shape; not liquid or fluid.
  4. 7. the external form, contours, or outline of someone or something.
  5. 9. the amount of space that a substance or object occupies, or that is enclosed within a container, especially when great.
  6. 11. a coherent, typically large body of matter with no definite shape.