Ch 02 Assignment.docx - Ch 2 Assignment NAME Big idea...

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Ch 2 Assignment NAME ________________________ Big idea: Elements, atom, and compounds Answer the following questions as you read modules 2.1–2.4: 1. Match the following definitions (column A)with their correct terms (column B) Column A Column B A substance required by humans in small quantities Trace element A substance that cannot be chemically broken down into a simpler substance Element Anything that takes up space and has mass Matter Substances with two or more elements in a fixed ratio compound A substance with different properties than the elements that make it up Emergent properties Matter Trace element Emergent properties Element Compound 2. Fill in the following diagram at right, which illustrates the relationship between compounds and elements. Provide an example of each in the space below. A B Are broken into their . . . 3.Neapolitan ice cream is vanilla, chocolate, and strawberry combined in a 1:1:1 ratio. Briefly explain how Neapolitan icecream is a good analogy that helps students understand the relationship between compounds and elements. 4.Students tend to think that, because trace elements are required in tiny quantities, they are not important. List two traceelements that humans require and briefly explain why those two trace elements are important.
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5. Use the two examples that you provided in question 4 to describe how these trace elements have been introduced into our diets and habits. Iodine is in the vegetables we eat, fish and seafood.. Iron is in a lot of green vegatables breakfast cereals and wheat bread. 6. Complete the following table that lists key features about subatomic particles. Protons Neutrons Electrons Electrical charge Positive charge No charge Negative charge Location in an atom Nucleus Nucleus Shells Mass 1.6726x10^27kg 1.674929x10^27kg 9.109390x10^31kg
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  • Fall '17
  • CALLHAN
  • Atom, Chemical bond

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