Electron

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Chemical bonding

Atom

Name ______________________________ In this activity we will learn how to draw Lewis structures, calculate formal charge and examine resonance. We will also observe the Octet rule and exceptions to this rule. AP Chem. Lewis Dot Structure Worksheet Write Lewis Dot Structures and calculate the formal charges for the following compounds: 1. SO2 18. H2O2 CO3-2 19. C2H6 NH3 20. CH3OH CH4 21. C2H4 H2 22. C4H10 HF 23. C2H5OH H2O 24. ClO- N2 25. H2S2 HCl 26. HNO3 H2S 27. H2SO4 PF3 28. CH3NO2 CH3COOH 29. C2H2 NH4+ 30. ClO2- NO2- 31. PO4-3 SO4-2 32. CO NO2+ 33. CO2 OH- Formal Charge

Honors Chem Notes - Bohr Models Dot Diagrams - powerpoint pdf

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Valence

I. Valence Electron ?Are the electrons in the HIGHEST energy level. II. The Octet Rule ?Most atoms tend to be more stable when their outer shell contains eight electrons. ?Atoms with fewer than 8 electrons are more reactive. Na VI. The Electron Dot Diagram ?Is a dot representing the number of electrons in the outer shell. What about Chlorine? Cl Na Cl 1 Electron in the outer shell 7 Electrons in the outer shell Let?s think??? What is the pattern? Assignment ?Complete worksheet on Electron Dot Diagrams!! ?This will be due next class!!

Periodic Table Notes

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Electrical resistivity and conductivity

Block

Atom

Halogen

Trends: 1. Across? ?the? ?period ? There? ?is? ?a? ?general? ?decrease? ?in? ?atomic? ?radius? ?across? ?the? ?period. - Across? ?a? ?period,? ?proton? ?number? ?increases? ?and? ?electrons? ?are? ?being? ?added? ?to? ?the? ?same? ?outermost principal? ?quantum? ?shell - Forces? ?of? ?attraction? ?between? ?the? ?valence? ?electron? ?and? ?nucleus? ?increases? ?as? ?nucleus? ?becomes more? ?positively? ?charged - Distance? ?between? ?the? ?valence? ?electron? ?and? ?nucleus? ?decreases. 2. Down? ?the? ?group ? There? ?is? ?a? ?general? ?increase? ?in? ?atomic? ?radius? ?down? ?the? ?group - Number? ?of? ?filled? ?principal? ?quantum? ?shell? ?increases

Biochemistry powerpoint

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Atoms

Valence

Chapter 2 The Chemical Context of Life Basic Terms Element = cannot be broken down to other substances Examples: Na, O, C, Cl Compound = combination of 2 or more different elements Examples: NaCl, CO2, CH4 Requirements for Life 92 natural elements? 25 are essential to life Carbon, oxygen, hydrogen, and nitrogen make up 96% of living matter Trace elements are needed, too, though Iodine?lack of = goiter!! Atomic Structure Atom = smallest possible amount of an electron that retains the element?s properties Subatomic particles: Protons = + charge Electrons = - charge Neutrons = neutral charge Atomic Structure Atomic Number: # of protons (also equals # of electrons?) Mass Number: # of protons + # of neutrons Examples Isotopes

BILOOGY REVIEW

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Enzyme

Cell

1st 9 week Study Guide--Biology Explain the difference between a control and a variable. What is the difference between a control group and an experimental group? Make a Venn diagram or T-chart comparing and contrasting a theory vs. a law. What is homeostasis? Smallest unit of life is ?. List ALL of the properties of water and give a real world example of each one. Explain the difference between adhesion and cohesion of water molecules. Why are water molecules considered polar? The pH scale is 0-14. Know which numbers are acidic and which are basic. Which side contains H+ and which is OH-? What is the difference between an ionic and covalent bond? What are the types of bonds called that connect one water molecule to another water molecule?

biology test review 9 weeks

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Enzyme

Cell

1st 9 week Study Guide--Biology Explain the difference between a control and a variable. What is the difference between a control group and an experimental group? Make a Venn diagram or T-chart comparing and contrasting a theory vs. a law. What is homeostasis? Smallest unit of life is ?. List ALL of the properties of water and give a real world example of each one. Explain the difference between adhesion and cohesion of water molecules. Why are water molecules considered polar? The pH scale is 0-14. Know which numbers are acidic and which are basic. Which side contains H+ and which is OH-? What is the difference between an ionic and covalent bond? What are the types of bonds called that connect one water molecule to another water molecule?

Chemistry Study Guide

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Atom

Chemistry Final Study Guide Chapter 1- Matter and Change Chemistry - is the study of the composition, structure, and properties of matter, the processes that matter undergoes, and the energy changes that accompany these processes. Chemical ? any substance with a definite composition. Mass ? measure of the amount of matter Matter ? anything that takes up space Atom ? the smallest unit of an element that maintains the chemical identity of that element Element - pure substance that cannot be broken down into simpler, substances and is made of one type of atom Compound ? a substance that can be broken down into simple stable substances. Each compound is made from the atoms of two or more elements that are chemically bonded

Campbell Biology Chapter 2 outline

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Baryons

Neutron

Matter

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#AP Bio #CampbellBiology #Chapter 2 #Outline

ion

Proton

SUBATOMIC PARTICLES Proton ? 1 positive charge (P+) Neutron ? no charge (N0) Electron ? 1 negative charge (E+) Nucleus An atom's dense central core, containing protons and neutrons. Electrons move around the nucleus Matter Anything that has mass and takes up space Elements Substance that cannot be broken down by a chemical reaction 92 occur naturally 25 of which are essential for life Bulk elements Required by the body in large amounts C N H O (make up 96% of the body) Trace elements Required by the body in small amounts Ultra trace elements Required by the body in minute amounts Atoms Smallest unit of matter that still retains properties of an element Weight Add proton and neutrons together for weight of nucleus Every proton and neutron weights one Dalton

chemistry/intro to bio

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Vaneza Paredes 1) Chemical Bonds Almost everything we do in life, even something as easy as breathing all comes from chemical bonds. There are strong bonds, as well as weak bonds. This all depends on the interactions of electrons. When a metal bonds with a nonmetal, an ionic bond was formed. This is very strong. A chemical bond formed by the sharing of one or more electrons, especially pairs of electrons, between atoms, is covalent bonding.

AP Chem Notes

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