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Valence electron

Bio stuff

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Periodic Table Worksheet Name Per. 1. Periodic means . Examples of periodic properties: 2. What is a group (or family)? What is a period? 3. How can you determine the number of electrons in an element?s outer energy level by the group it?s in? 4. What is the octet rule? 5. Why do elements that make positive ions occur on the left side of the periodic table while those that make negative ions occur on the right? 6. What is the common name for group 18? Why do the elements of this group usually not form ions? 7. Complete the following table. Group Common Name Charge on Ions of this Group 1 2 13 / 3A -------- 16 / 6A -------- 17 / 7A 8. Predict the charges on ions of the following atoms.

Chemistry

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Social issues in forbidden city Corrupted government Ignorant Deals issues in violent ways Their views on democracy which the students want Indifference Their views are based on Maoism (the PLA retaliated by using violence) Cultural Aspects Appearance Patriotic government very rightist (conservative) Traditional and hardworking society Food Housing Manners idk (the part where alex learns that it is expected to put a lot of food on the table but not eat it because it means that you?ve ate too much and you can?t eat anymore) Plot Talk about the student demonstration May 4th include hunger strike and martial law Death of Hu Yao Bang Li Peng PLA and talk about one part of like war ( teargas cannisters , AK47, Xin Hua Shot, Lao Xu Dead

Anatomy Chemistry

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Chemistry Notes in Physiology Chemistry notes in Physiology: Atoms Atom?the basic unit of an element An atom consists of subatomic particles: Proton This has a ( + ) charge The number of protons in an atom is called atomic number Neutron This has no charge Electron This has a ( ? ) charge The number of electrons is usually equal to the number of protons ? Both the proton and the neutron are in the nucleus The sum of the proton and neutron is called atomic mass Shell = energy level 1st shell has 2 electrons 2nd shell has 8 electrons Valence electrons are the outermost electrons ? Isotopes = same atomic number, but different atomic mass Isotopes will differ in the number of neutrons For example: Hydrogen has 1 proton Deuterium has 1 proton and 1 neutron

Campbell Biology Chapter 1-4 Outline

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The Chemical Context of Life 8/22/13 6:23 PM Chapter 1: Exploring Life Biology?s Most Exciting Era Biology- the scientific study of life Biologists explore life from the microscopic to the global scale A Hierarchy of Biological Organization The biosphere- consists of all the environments on Earth that are inhabited by life. Ecosystems- consists of all the living things in a particular area, along with all the nonliving components of the environment with which life interacts. Ex. forest The biosphere is composed of ecosystems Communities- the entire array of organisms inhabiting a particular ecosystem. The set of populations that inhabit a particular area Populations- consists of all the individuals of a species (forms of life) living within the bounds of a specified area

Campbell Biology 9th edition

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Campbell Biology Review Chapter 2 1. All organisms are composed of ____________, which is defined as anything that occupies space and has mass. 2. What is the definition of an element? 3. How does a compound differ from an element? 4. What four chemical elements compose about 96% of living matter? 5. What name is given to elements found in small amounts that are necessary to living matter? 6. Which of these elements (type given above) is necessary to man and other vertebrates but not to other living organisms? a. Oxygen b. Iodine c. Phosphorus d. Calcium e. None of the Above 7. What element, known as a toxin to man, has inadvertently been found in Asian drilled wells, exposing many to its dangerous effects?

Campbell Biology 9th edition

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Campbell Biology Review Chapter 2 1. All organisms are composed of ____________, which is defined as anything that occupies space and has mass. 2. What is the definition of an element? 3. How does a compound differ from an element? 4. What four chemical elements compose about 96% of living matter? 5. What name is given to elements found in small amounts that are necessary to living matter? 6. Which of these elements (type given above) is necessary to man and other vertebrates but not to other living organisms? a. Oxygen b. Iodine c. Phosphorus d. Calcium e. None of the Above 7. What element, known as a toxin to man, has inadvertently been found in Asian drilled wells, exposing many to its dangerous effects?

AP Chemistry periodic notes

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Chapter 7 ? Periodic Properties of the Elements 7.1 Development of the Periodic Table ? Majority of elements discovered 1735-1843 ? Elements arranged to reflect trends in chemical and physical properties ? Periodic table arose from periodic patterns in electronic configurations o Valence orbitals o Trends in rows and columns ? Mendeleev and Meyer ? Modern periodic table 7.2 Effective Nuclear Charge Effective nuclear charge (Zeff) is the charge experienced by an electron on a many-electron atom. The effective nuclear charge is not the same as the charge on the nucleus because of the effect of the inner electrons. ? The electron is attracted to the nucleus, but repelled by electrons that shield or screen it from the full nuclear charge.

Campbell Bio 9e Test 2

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Campbell's Biology, 9e (Reece et al.) Chapter 2 The Chemical Context of Life This chapter presents basic chemical principles for understanding the chemical context of living organisms, from atomic structure to the nature of chemical bonds and an introduction to chemical equilibrium. These questions focus on elements most important to life or the study of life, including the elements that comprise organic molecules and important trace elements. Some isotopes are important in geologic dating and in biological tracer studies. How elements participate in forming different types of chemical bonds is essential to mastering subsequent topics on the behavior and properties of biological molecules, structures, and energy metabolism. Multiple-Choice Questions

Campbell Reece 8th Edition Test bank chapter 2

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Chapter 2 The Chemical Context of Life 1) About 25 of the 92 natural elements are known to be essential to life. Which four of these 25 elements make up approximately 96% of living matter?? A) carbon, sodium, chlorine, nitrogen? B) carbon, sulfur, phosphorus, hydrogen? C) oxygen, hydrogen, calcium, sodium? D) carbon, hydrogen, nitrogen, oxygen? E) carbon, oxygen, sulfur, calcium? Answer: ?D? Topic: ?Concept 2.1? Skill: ?Knowledge/Comprehension 2) Trace elements are those required by an organism in only minute quantities. Which of the following is a trace element that is required by humans and other vertebrates?? A) nitrogen? B) calcium? C) iodine? D) sodium? E) phosphorus? Answer: ?C? Topic: ?Concept 2.1? Skill: ?Knowledge/Comprehension

Campbell Biology 9th All multiple choice Chp 2.

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Campbell's Biology, 9e (Reece et al.) Chapter 2 The Chemical Context of Life This chapter presents basic chemical principles for understanding the chemical context of living organisms, from atomic structure to the nature of chemical bonds and an introduction to chemical equilibrium. These questions focus on elements most important to life or the study of life, including the elements that comprise organic molecules and important trace elements. Some isotopes are important in geologic dating and in biological tracer studies. How elements participate in forming different types of chemical bonds is essential to mastering subsequent topics on the behavior and properties of biological molecules, structures, and energy metabolism. Multiple-Choice Questions

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