Read Chapter 4 Elements and the Periodic Table text version

Name: Physical Science Grade 8

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Chapter 4 Elements and the Periodic Table

Instructions: Complete the crossword puzzle. Use the clues to help identify the words.

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10 12 13 16 14

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1. ____ symbol: A one or two letter representation of an element. 6. A small particle in the nucleus of the atom, with no electrical charge. 7. A term used to describe material that can be pounded into shapes. 9. ____ metal: An element in Group 1 of the periodic table. 14. An element found in Group 17 of the periodic table. 16. An element that has some characteristics of both metals and nonmetals. 17. A class of elements characterized by physical properties that include shininess, malleability, ductility, and conductivity. 19. A positively charged particle that is part of an atom's nucleus. 21. An element that lacks most of the properties of a metal.

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22. The spontaneous emission of radiation by an unstable atomic nucleus.

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1. electrical ____: The ability of an object to transfer electric current. 2. A negatively charged particle that is found outside the nucleus of an atom, 3. A mixture of two or more elements, one of which is a metal. 4. ____ gas: An element found in Group 18 of the periodic table. 5. ____ number: The number of protons in the nucleus of an atom. 7. ____ number: The sum of protons and neutrons in the nucleus of an atom. 8. ____ particle: A fast moving electron that is given off as nuclear radiation. 9. ____ particle: A type of nuclear radiation consisting of two protons and two neutrons. 10. A material that conducts current under certain conditions. 11. ____ earth metal: An element in Group 2 of the periodic table. 12. Elements in the same vertical column of the periodic table; also called a family. 13. An atom with the same number of protons and a different number of neutrons from other atoms of the same element 15. ____ radiation: A type of nuclear radiation made of high energy waves. 18. ____ metal: One of the elements in Groups 3 through 12 of the periodic table. 20. A horizontal row of elements in the periodic table.

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