Across
- 2. name given to an electron in the outermost orbit that is easily moved
- 5. solid passing into a gaseous state without melting
- 8. unifying concept used to organize elements and their similarities
- 9. has definite weight shape and volume
- 12. the ability to do work to accomplish some change
- 14. basic materials the body uses to construct and renew itself
Down
- 1. scientific study of matter
- 3. forces that hold atoms together in compounds
- 4. fill intercellular spaces in the skin
- 6. anything that occupies space
- 7. charged atoms involved in a chemical reaction
- 10. smallest complete unit of an element
- 11. basic units of matter that cannot be broken down into simpler substances by any chemical reaction
- 13. definite weight but indefinite volume and shape
- 15. protons and neutrons packed tightly to form dense core at the center of the atom