Across
- 2. each of more than one hundred substances that cannot be chemically interconverted or broken down into simpler substances and are primary constituents of matter.
- 3. (of a substance) consisting of uncombined atoms rather than molecules.
- 4. 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.
- 6. the way in which a natural phenomenon or a machine works or functions.
- 8. an attribute, quality, or characteristic of something.
- 9. the basic unit of a chemical element.
- 11. the idea that every substance has at least one property that makes it unique and able to be differentiated from other substances
- 12. a particular kind of matter with uniform properties.
- 16. a feature or quality belonging typically to a person, place, or thing and serving to identify it.
- 17. a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.
- 19. the nature of something's ingredients or constituents; the way in which a whole or mixture is made up.
- 20. the central and most important part of an object, movement, or group, forming the basis for its activity and growth.
Down
- 1. a central or primary rule or principle on which something is based.
- 5. remaining the same in all cases and at all times; unchanging in form or character.
- 7. made up or consisting of two or more existing parts or elements.
- 10. a substance made by mixing other substances together.
- 13. relating to the nucleus of an atom.
- 14. a minute portion of matter.
- 15. 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.
- 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.