Across
- 2. Pure substance that is not able to be broken down chemically
- 4. Chemical bond between two or more metals.
- 5. Neutral subatomic particles found in the nucleus
- 6. Outer most electron shell (energy level)
- 8. Total quantity of matter determined by the combined mass of its protons and neutrons
- 9. Anything that has mass and occupies space
- 11. Chemical bond between a metal and a nonmetal.
- 13. A chemical substance that releases hydrogen ions (H⁺) in water, has a pH level below 7, tastes sour, and reacts with bases to form salts
- 14. A substance made from two or more different elements that are chemically bonded
- 15. Composed of two or more different elements or compounds that are not chemically combined
- 16. The center of an atom that contains protons and neutrons
- 18. The basic building blocks of matter that make up everything
Down
- 1. Positively charged subatomic particles found in the nucleus
- 3. Negatively charged subatomic particle found in the electron cloud surrounding the nucleus
- 7. the area outside of an atom’s nucleus that contains electrons
- 10. Chemical bond between two nonmetals.
- 12. number the total number of protons found in the nucleus of an atom of a chemical element
- 17. A chemical substance that accepts hydrogen ions, feels slippery, and has a pH value greater than 7