Across
- 3. 2 or more substances that are physically combined
- 5. The sum of the number of protons and neutrons
- 6. A neutral particle found in an atom
- 11. A mixture that is universal throughout.
- 12. Most stable family on the periodic table
- 14. The maximum number of electrons that can be held in the second energy level
- 16. A mixture that is not universal throughout (you can see the parts of it).
- 18. Most elements on the periodic table can be classified as
- 19. A positively charged atom
- 21. Protons have a _____ charge
- 23. Atomic number 5
- 24. Type of bond where 2 or more non-metals share electrons
- 26. State of matter in which particles have the most energy
- 28. 2 or more different elements that are chemically combined
- 29. Group of metals on the periodic table that have 2 valence electrons
Down
- 1. Anything that has mass and takes up space
- 2. Protons and _____ are found in the nucleus of an atom.
- 4. An atom with an electrical charge
- 7. Negatively charged particle that orbits the nucleus, found in certain energy levels.
- 8. In the compound H2O there are how many hydrogens?
- 9. Group of electrons that are responsible for chemical bonding
- 10. A negatively charged atom
- 13. The part of an atom that tells you how many protons an element contains.
- 15. Group 17 is called the ________ family. This group has elements with 7 valence electrons
- 17. Number of valence electrons lithium has
- 19. Element that has 6 protons and 6 neutrons.
- 20. The rows on a periodic table are called?
- 22. Type of chemical bond where a metal and a non-metal bond
- 25. State of matter in which molecules have a definite volume but not a definite shape.
- 27. Solids are said to have a definite shape and definite _______.
- 30. Simplest pure substance that cannot be broken down into anything smaller