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Metals
Metals

... Halogens”.  They  form acids with hydrogen and  exist as diatomic molecules. (F2,  ...
Ionic bonding
Ionic bonding

... What is the mass number of this chlorine atom? What is the atomic number of this chlorine atom? How many protons neutrons and electrons does this chlorine atom have? 4. What is the electron configuration of a chlorine atom? 5. What is the relative mass of an electron? 6. What is the charge on a neut ...
The Chemical Context of Life
The Chemical Context of Life

...  Matter is made up of elements  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  A compound has characteristics different from those of its elements ...
C2 Revision Quick Questions FT
C2 Revision Quick Questions FT

... What is the mass number of this chlorine atom? What is the atomic number of this chlorine atom? How many protons neutrons and electrons does this chlorine atom have? 4. What is the electron configuration of a chlorine atom? 5. What is the relative mass of an electron? 6. What is the charge on a neut ...
C2 revision slides V3 + questions + MS – F
C2 revision slides V3 + questions + MS – F

... What is the mass number of this chlorine atom? What is the atomic number of this chlorine atom? How many protons neutrons and electrons does this chlorine atom have? 4. What is the electron configuration of a chlorine atom? 5. What is the relative mass of an electron? 6. What is the charge on a neut ...
C2 Revision Quick Questions FT
C2 Revision Quick Questions FT

... What is the mass number of this chlorine atom? What is the atomic number of this chlorine atom? How many protons neutrons and electrons does this chlorine atom have? 4. What is the electron configuration of a chlorine atom? 5. What is the relative mass of an electron? 6. What is the charge on a neut ...
Chemistry 11th
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Study Guide
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C2_revision_slides_V3_+_questions_+_MS_-_H[1]
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Ionic bonding
Ionic bonding

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Ionic bonding - Animated Science
Ionic bonding - Animated Science

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topic 3: periodicity
topic 3: periodicity

...  in non-metallic elements: the atomic radius is half the distance between the centres of two covalently bonded atoms (= covalent radius). In table 8 of the data booklet, there is no atomic radius for inert gases as they do not make covalent bonds in diatomic molecules.  in metallic elements: the a ...
C2 revision slides V3 + questions + MS
C2 revision slides V3 + questions + MS

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Periodic Table Review Key
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General Chemistry I - University of Toledo
General Chemistry I - University of Toledo

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Matter - tompkinsmath
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... element. Recall: The number of valence electrons (outermost electrons) of an element is equal to its group number. 2. Draw the symbol of the element. The symbol of the element is used to represent the core (protons and neutrons) and the inner electrons. 3. The symbol is assumed to have four sides, a ...
Identify the following properties as either - Teach-n-Learn-Chem
Identify the following properties as either - Teach-n-Learn-Chem

... 1. Explain what is wrong with the statement “My friend burned a piece of paper (a hydrocarbon) that had the final exam on it and it disappeared”. (Be sure to use a chemical equation, identify reactants and product(s) and include energy). ANSWER: The paper (CxHy) was burned with oxygen and the atoms ...
Document
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... 1. Explain what is wrong with the statement “My friend burned a piece of paper (a hydrocarbon) that had the final exam on it and it disappeared”. (Be sure to use a chemical equation, identify reactants and product(s) and include energy). ANSWER: The paper (CxHy) was burned with oxygen and the atoms ...
Atoms, Molecules, and Ions
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... academic honesty and holds students accountable for the integrity of all work they submit. Students should understand that it is their responsibility to learn about course-specific expectations, as well as about university-wide academic integrity expectations. The policy governs appropriate citation ...
Answers - U of L Class Index
Answers - U of L Class Index

... The next electron added to Be would start a new subshell (2p). The four electrons already in Be would shield enough of the +4 nuclear charge (from the four protons in the nucleus) that the new electrons would feel as much repulsion from the four electrons as it would feel attraction to the nucleus. ...
Stoichiometry - hrsbstaff.ednet.ns.ca
Stoichiometry - hrsbstaff.ednet.ns.ca

...  given the reactants in an organic reaction, being able to determine which type of reaction will proceed, and predict what the products will be, including the formation of isomers. (Reactions should be limited to the formation of no more than two structural isomers; if more are possible, students s ...
atomic theory of matter
atomic theory of matter

... John A. Schreifels Chemistry 211 ...
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Resonance (chemistry)



In chemistry, resonance or mesomerism is a way of describing delocalized electrons within certain molecules or polyatomic ions where the bonding cannot be expressed by one single Lewis formula. A molecule or ion with such delocalized electrons is represented by several contributing structures (also called resonance structures or canonical forms).Each contributing structure can be represented by a Lewis structure, with only an integer number of covalent bonds between each pair of atoms within the structure. Several Lewis structures are used collectively to describe the actual molecular structure, which is an approximate intermediate between the canonical forms called a resonance hybrid. Contributing structures differ only in the position of electrons, not in the position of nuclei.Electron delocalization lowers the potential energy of the substance and thus makes it more stable than any of the contributing structures. The difference between the potential energy of the actual structure and that of the contributing structure with the lowest potential energy is called the resonance energy or delocalization energy.Resonance is distinguished from tautomerism and conformational isomerism, which involve the formation of isomers, thus the rearrangement of the nuclear positions.
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