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Ch. 14 Periodic Table

Ch. 14 Periodic Table. Applied Chemistry Milbank High School. Substances. __________ - simplest kind of matter all one kind of atom. __________ are substances that can be broken down only by chemical methods

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Ch. 14 Periodic Table

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  1. Ch. 14 Periodic Table Applied Chemistry Milbank High School

  2. Substances • __________- simplest kind of matter • all one kind of atom. • __________ are substances that can be broken down only by chemical methods • When broken down, the pieces have completely different properties than the original compound. • Made of two or more atoms

  3. Development of the Periodic Table • mid-1800s, about ___ elements • Dmitri Mendeleev – Russian chemist • Arranged elements in order of increasing ___________ • Thus, the first “Periodic Table” • Left blanks for undiscovered ________ • When discovered, good prediction

  4. Periodic table • Horizontal rows = _______ • There are __ _______ • Periodic law: • Vertical column = _______ (or family) • Similar physical & chemical prop. • Identified by number & letter

  5. Metals • _________ – alkali metals • Group 2A – _______________ • Transition metals and _____ _________ metals • All metals are solids at room temperature, except _____.

  6. Nonmetals • ___________: generally nonlustrous, poor conductors of electricity • Some gases (O, N, Cl); some are brittle solids (S); one is a fuming dark red liquid (Br) • Group 7A – _________ • Group 8 – ______ _______

  7. Division between metal & nonmetal • Heavy, stair-step line • ____________ border the line • Properties intermediate between metals and nonmetals • Learn the general behavior and trends of the elements, instead of memorizing each element property

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