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Chapter 3 Study Guide

Chapter 3 Study Guide. 7 th Grade. An elements properties can be predicted from its Location in the periodic table. 2. In the ___ state of matter, electrons are stripped away from the nuclei. Plasma. If a substance is _______, it can be pulled or drawn into a wire. ductile.

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Chapter 3 Study Guide

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  1. Chapter 3 Study Guide 7th Grade

  2. An elements properties can be predicted from itsLocation in the periodic table

  3. 2. In the ___ state of matter, electrons are stripped away from the nuclei.Plasma

  4. If a substance is _______, it can be pulled or drawn into a wire.ductile

  5. The sun and many other stars are made mostly of the elementhydrogen

  6. A(n) _______is a positively charged particle in an atom’s nucleus.proton

  7. Which of the following is NOT a characteristic of most metals?brittle

  8. An element’s _______ tells the number of protons in its nucleus.atomic number

  9. Dmitri Mendeleev created the firstperiodic table

  10. The particle that are lost, gained, or shared in chemical reactions areelectrons

  11. A(n) ________has some of the properties of both metals and nonmetals.metalloid

  12. A(n) __________consists of two nonmetal atoms bonded together.Diatomic molecule

  13. 12. The family of ________is the most reactive group of metals in the periodic table.Alkali metals

  14. 13. The ______ and the _____ are shown at the bottom of the periodic table in order to keep the table a reasonable size.Lanthanides; actinides

  15. A mixture of metals is called a(n) ____________.alloy

  16. The _______family is a very reactive group of nonmetals whose atoms gain or share one electron in chemical reactions.halogen

  17. Metals are good conductors of heat and electricity.

  18. From left to right in the periodic table, the elements are arrange in order of increasing atomic mass.

  19. The mass of a proton is about one atomic mass unit.

  20. The reactivity of the metal elements generally decreases as you move from left to right across the periodic table.

  21. Helium nuclei and energy are the products of the nuclear fusion of the sun’s hydrogen.

  22. Essay question: 5 points*pick one of the following topics*answer in complete, well written sentences

  23. *In the periodic table, the transition metals, such as chromium, iron, and copper, are located between the reactive alkali earth metals on the far left and the less reactive metals and other elements on the right side. Describe three properties of the transition metals. * What is a supernova and how is it related to the matter found on Earth?*What information can be found in a square of the periodic table? What does each piece of information mean?

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