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Unit 1 review… 1

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Covert the following metric measurements… 1.12.34 mm = ? cm 2.155.9 ml = ? L 2

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Unit 1 review… List four ways to physically separate substances (mixtures) 3

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Unit 1 review… Give three indicators of a chemical change 4

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Unit 1 review… Express the following two numbers in proper scientific notation (with the correct number of sig figs) A. 0.00046 B.580,100,000,000,000 5

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Unit 1 review… Give three pure examples from the periodic table of both metals and non-metals. 6

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Unit 1 review… Determine the mass of a piece of metal with a density of 7.95 g/ml and a volume of 57 cm 3. – Make sure your answer is in the correct number of sig figs 7

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Unit 1 review… List two properties of metals and non- metals(in general) 8

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Unit 1 review… How many Sig Figs are in the following numbers? A..011 B.1.00 C.10.0 D.100 9

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Unit 1 review… Give the correct answer to the following math problem: (6.02 x 10 23 ) x 1.87 (5.5 x 10 14 ) Put your answer in the correct number of sig figs 10

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Unit 1 Review…Which of the following part or parts of John Daltons Atomic Theory has been altered/changed since his time in the early 1800s? 1.All matter is composed of extremely small particles called atoms 2.Atoms of a given element are identical in size, mass, and other properties; atoms of different elements differ in size, mass, and other properties 3.Atoms cannot be subdivided, created, nor destroyed 4.Atoms of different elements combine in simple whole-number ratios to form chemical compounds 5.In chemical reactions, atoms are combined, separated, or rearranged 11

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Unit 1 review… What are the three common parts of all atoms? AND, What are their masses in a.m.u.? 12

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Unit 1 review… Do all atoms of the same element have the same mass? Yes or NO…and What makes up the majority of mass of an atom? 13

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Unit 1 review… what is an isotope? (define) And… What makes one isotope of an element different from another isotope? 14

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Unit 1 review… What is the molar mass of the following three elements…(write your answer to three decimal places) – Carbon – Sulfur – Sodium 15

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END review for 2014… 16

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Unit 1 review… A certain metallic cylinder is made of bronze which is determined to be 80.0% tin and 20.0% copper. If the metal cylinder weighs 15.60 grams, how much of the cylinder is tin and how much is copper? (in grams) Put answers in correct number of sig figs… 17

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Unit 1 review… A certain metallic cylinder is made of bronze which is determined to be 80.0% tin and 20.0% copper. If the metal cylinder weighs 15.60 grams, how much of the cylinder is tin and how much is copper? (in grams) How many moles of copper is in this metal cylinder? (correct sig figs) 18

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Weighing and Counting Atoms

Weighing and Counting Atoms

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