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Chemical properties

Chapter 8 Solutions

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Periodic Properties of the Elements Review Questions 8.1 A periodic property is one that is predictable based on the element's position within the periodic table. 8.2 The relative size of the sodium and potassium ions is important to nerve signal transmission. The pumps and channels within cell membranes are so sensitive that they can distinguish between the sizes of these two ions and selectively allow only one or the other to pass. The movement of ions is the basis for the transmission of nerve signals in the brain and throughout the body. 8.3 The first attempt to organize the elements according to similarities in their properties was made by the German chemist Johann Dobereiner. He grouped elements into triads; three ele-

Chapter 8 Test Banks

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? Chemistry: A Molecular Approach (Tro) ? Chapter 8 ?? Periodic Properties of the Elements ? 1) ?? Give the ground state electron configuration for Se. ? A) ?? [Ar]4s23d104p4 ? B) ?? [Ar]4s24d104p4 ? C) ?? [Ar]4s23d104p6 ? D) ?? [Ar]4s23d10 ? E) ?? [Ar]3d104p4 ? Answer: ?? A ? 2) ?? Give the ground state electron configuration for I. ? A) ?? [Kr]5s24d105p6 ? B) ?? [Kr]5s24d105p5 ? C) ?? [Kr]4d105p6 ? D) ?? [Kr]5s25p6 ? E) ?? [Kr]5s25d105p6 ? Answer: ?? B ? 3) ?? Give the ground state electron configuration for Sr. ? A) ?? [Kr]5s24d2 ? B) ?? [Kr]5s24d105p2 ? C) ?? [Kr]5s2 ? D) ?? [Kr]5s25d105p2 ? E) ?? [Kr]5s24d10 ? Answer: ?? C ? 4) ?? Give the ground state electron configuration for Pb. ? A) ?? [Xe]6s26p2 ? B) ?? [Xe]6s25d106p2 ? C) ?? [Xe]6s25f146d106p2 ? D) ??

APBIOLOGY

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Chapter?1 Introduction:?Themes?in?the?Study?of?Life Multiple-Choice?Questions 1) Which?of?the?following?properties?or?processes?do?we?associate?with?living?things? A) evolutionary?adaptations B) energy?processing C) responding?to?the?environments D) growth?and?reproduction E) all?of?the?above Answer: E Topic: Overview Skill: Knowledge/Application 2) Which?of?the?following?is?not?a?theme?that?unifies?biology? A) interaction?with?the?environment B) emergent?properties C) evolution D) reductionism E) structure?and?function Answer: D Topic: Concept?1.1 Skill: Knowledge/Application 3) Which?of?the?following?sequences?represents?the?hierarchy?of?biological?organization?from?the?least?to?the?most complex?level? A) organelle,?tissue,?biosphere,?ecosystem,?population,?organism

APBIOLOGY

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Chapter?1 Introduction:?Themes?in?the?Study?of?Life Multiple-Choice?Questions 1) Which?of?the?following?properties?or?processes?do?we?associate?with?living?things? A) evolutionary?adaptations B) energy?processing C) responding?to?the?environments D) growth?and?reproduction E) all?of?the?above Answer: E Topic: Overview Skill: Knowledge/Application 2) Which?of?the?following?is?not?a?theme?that?unifies?biology? A) interaction?with?the?environment B) emergent?properties C) evolution D) reductionism E) structure?and?function Answer: D Topic: Concept?1.1 Skill: Knowledge/Application 3) Which?of?the?following?sequences?represents?the?hierarchy?of?biological?organization?from?the?least?to?the?most complex?level? A) organelle,?tissue,?biosphere,?ecosystem,?population,?organism

The Chemistry Of Life

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Chapter 2 The Chemical Context of Life Elements and Compounds An element is a substance that cannot be broken down to other substances by chemical reactions A compound is a substance consisting of two or more elements in a fixed ratio Sodium Chlorine Sodium chloride Essential Elements of Life Carbon, hydrogen, oxygen, and nitrogen make up 96% of living matter Trace elements are those required by an organism in minute quantities LE 2-3 Nitrogen deficiency Iodine deficiency LE 2-4 Nucleus Electrons Cloud of negative charge (2 electrons) Atomic Number and Atomic Mass Atoms of the various elements differ in number of subatomic particles Atomic number Mass number Atomic mass Isotopes Atoms of an element have the same number of protons but may differ in number of neutrons

The Chemistry Of Life

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Chapter 2 The Chemical Context of Life Elements and Compounds An element is a substance that cannot be broken down to other substances by chemical reactions A compound is a substance consisting of two or more elements in a fixed ratio Sodium Chlorine Sodium chloride Essential Elements of Life Carbon, hydrogen, oxygen, and nitrogen make up 96% of living matter Trace elements are those required by an organism in minute quantities LE 2-3 Nitrogen deficiency Iodine deficiency LE 2-4 Nucleus Electrons Cloud of negative charge (2 electrons) Atomic Number and Atomic Mass Atoms of the various elements differ in number of subatomic particles Atomic number Mass number Atomic mass Isotopes Atoms of an element have the same number of protons but may differ in number of neutrons

Chemistry

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Chemistry Study Guide Unit 1: Measurement and the Methods of Chemistry Counting significant figures: 1) leading zeros never count 2) Trailing zeros only count if there is a decimal point written 3) All numbers that aren?t leading or trailing zeros count Unit 2: Atomic Structure, Periodicity, and Nuclear Energy Proton: +1 (charge) Neutron: 0 (charge) Electron: -1 (charge) Atomic number= number of protons within an atom Atomic mass= total weight of the atom. P+N If there is a power to the left of the element, that implies the mass. Isotope: same atom with same atomic number, but different number of neutrons. Different weight. Neutrons and protons are INSIDE nucleus. Electrons on orbitals. Valence electrons= electrons on outermost shell. The electrons that do all reactions.

Something?

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Question 1?(Worth 1 points) [02.01]Which of the following is essential for a theory to become widely accepted within the scientific community? ?A theory must include a valid scientific model. ?A theory must be supported by many different experiments. ?A theory is an educated guess based on multiple observations. ?A theory must change over time regardless of the scientific data. Points earned on this question: 1 Question 2?(Worth 1 points) [02.01]Which of the following is the?best?definition of a scientific model? ?any visual representation of scientific experimental findings ?a 3-d object used to demonstrate key scientific theories and data ?a visual, verbal, or mathematical explanation of experimental data ?an explanation of any scientific idea, theory, or experimental results

AP Bio: Potato Osmosis Lab Report

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As visible from the data presented in the table and graph, the mass change in percent seems to decrease as the sucrose concentration increases. There seems to be minimal percent change of mass between 0.7M and 0.8M. Conclusions/Discussion After carefully recording data, we extrapolated that there is an inverse relationship between sucrose concentration and mass change. The inverse relationship is that as sucrose concentration increases, the mass change will decrease. By the conclusion, it was also concluded that the color-coded solutions had molarities of: Yellow= 0.2M Blue= 0.4M Clear= 0.6 Pink= 0.8M Green= 1M The hypothesis was supported by this conclusion.

chem

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CALIFORNIA STANDARDS TEST CHEMISTRY (Blueprint adopted by the State Board of Education 10/2002) CALIFORNIA CONTENT STANDARDS: CHEMISTRY # of Items % Atomic and Molecular Structure 6 10.0% 1. The periodic table displays the elements in increasing atomic number and shows how periodicity of the physical and chemical properties of the elements relates to atomic structure. As a basis for understanding this concept: a. Students know how to relate the position of an element in the periodic table to its atomic number and atomic mass. 1 b. Students know how to use the periodic table to identify metals, semimetals, non-metals, and halogens. 1

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