Homework 4: Metals And Nonmetals

2009 - 2010

Homework 4: 9/10/09 - 9/17/09

Mr. Sam Harrelson MS Room 312 Email: [email protected] Tel: 864-381-7374 (or 864-381-SDSG) http://griffinscience.com

Following are the six objectives we’ll be learning this week as a part of our study of Physical Science. More information can be found on GriffinScience.com and feel free to email or call me with any questions you might have! Mr. Harrelson -Objective 1: List the physical properties of metals. 1. Which elements on the periodic table are metals? 2. List the four main properties of metals. 3. What does malleable mean? 4. What types of materials can be rolled out into a long wire? 5. Are metals good conductors? Objective 2: Explain how reactivity of metals changes across the periodic table. 1. How do metals normally react? 2. Give examples of metals that lack reactivity. 3. Why does iron rust? What is that process called? 4. Give the group numbers and an example of the following: a) alkali metal b) alkali earth metal c) transition metal d) mixed group metals e) Lanthanides and f) Actinides. 5. Describe the pattern of melting points of the Group 1 elements. Objective 3: Describe the properties of nonmetals. 1. What is a nonmetal? 2. Are nonmetals good conductors of electricity or poor conductors? Physical Science - Grade 8 - Homework 4

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2009 - 2010

Homework 4: 9/10/09 - 9/17/09

3. Describe solid nonmetals using only 3 words. 4. What is the only nonmetal that is a liquid at room temperature? 5. Please give some examples of how nonmetals and metals are different. Objective 4: Understand How Nonmetals are Grouped in Families 1. What are the main nonmetal families? Please give an example of each. 2. How many electrons can elements in the Carbon Family gain, lose or share? 3. How many electrons can elements in the Nitrogen Family gain or share? 4. How many electrons can elements in the Oxygen Family gain or share? 5. How many electrons can elements in the Halogen Family gain or share? 6. What is the most useful property of metalloids? Objective 5: Realize how radioactivity was discovered and how radioactive isotopes are useful today. 1. What does radioactivity have to do with isotopes? What does radioactivity have to do with squirrels? 2. Who discovered the effects of radioactive decay? 3. What couple realized that a reaction was taking place in the nuclei of uranium causing radiation? 4. Which two new elements did the Curies isolate? 5. What are tracers? Objective 6: Identify the types of particles and energy that radioactive decay can produce. 1. What are the three major forms of radiation produced during radioactive decay? 2. A particle which consists of two protons and two neutrons and is positively charged is called a _____________________________squirrel________________. 3. A ______________________squirrel_________________ is a fast moving electron given off by a nucleus during radioactive decay. 4. Which type of radiation has no charge and does not cause a change in either mass or atomic number? 5. Which type of nuclear radiation is the most penetrating?

Physical Science - Grade 8 - Homework 4

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