Across
- 1. a small particle in the nucleus of the atom with no electrical charge
- 5. A pure substance that cannot be broken down into other substances by chemical or physical means
- 7. An element in group 18 of the periodic table
- 11. A horizontal row of elements in the periodic table
- 12. Another word for metalloid
- 13. A substance made from two or more elements and chemically combined
- 14. An arrangement of the elements that shows their symbols and properties
- 16. elements with characteristics of both metals and nonmetals
- 17. all elements located on the right side of the periodic table with the exception of hydrogen
- 18. The Average mass of all Isotopes of an element
- 19. Located on the left side of the periodic table
Down
- 2. The core of an atom that contains protons and neutrons
- 3. Positively charged particles found in the nucleus of an atom
- 4. Indicates how likely an element is to undergo a chemical change
- 6. Two or more substances that are in the same area but are not chemically bonded
- 8. A one- or two -letter representation of an element
- 9. A vertical column on the periodic table also called family
- 10. A tiny negatively charged particle that moves around the outside of the nucleus of an atom
- 15. The Number of protons in the nucleus of an atom
- 18. The basic particle from which all elements are made