chapter3tro - CHEMISTRY 161 Chapter 3 1 Structure of an...

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CHEMISTRY 161 Chapter 3
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1. Structure of an Atom subatomic particles electrons (‘cloud’) protons (nucleus) neutrons (nucleus) m(n) / m(e) ≈ 2000 m(n) > m(p)
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2. Atomic & Mass Number A Z X atomic number (number of protons) (number of electrons) mass number (number of protons plus neutrons)
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Compounds & Chemical Reactions 1. Compounds 2. The Chemical Formula 3. The Chemical Equation 4. The Name of Chemicals
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1. Compounds molecular compounds ionic compounds EXPI
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Molecular Compounds 1. consist of electrically neutral particles called molecules 2. each molecule consists of atoms 3. atoms are connected via electrons 4. connections are called bonds (‘springs’) EXPII
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Molecular Compounds Group Period IVA VA VIA VIIA Noble Gas 2 Ne 3 2 Ar 4 GeH 4 AsH 3 H 2 Se HBr Kr 5 SbH 3 H 2 Te HI Xe lots of molecules contain hydrogen EXPIII
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H 2 , He Jupiter PH 3 CH 4 EXPIV
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H 2 , He Saturn NH 3 /PH 3 CH 4 H 2 O (s)
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atom (neutral) add electron(s) (reduction) anion (Cl - ) (negative charge) (non-metal) take electron(s) (oxidation) cation (Na + ) (positive charge) (metal) Ionic Compounds I 1. consist of charged particles 2. charged particles are called ions 3. ions are formed by electron transfers from atoms
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Ionic Compounds II 4. ionic compounds are held together by electrostatic forces Cl - Na + metal non-metal NaCl MgO EXPV
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Compounds & Chemical Reactions 1. Compounds 2. The Chemical Formula 3. The Chemical Equation 4. The Name of Chemicals
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2. The Chemical Formula collection of chemical symbols used to describe the composition of elements and compounds NaCl H 2 O Fe 2 O 3 CaSO 4 × 2 H 2 O
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2. The Chemical Formula collection of chemical symbols used to describe the composition of elements and compounds He EXPVI
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F F EXPVII
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O O
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N N
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H H
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Compounds & Chemical Reactions 1. Compounds 2. The Chemical Formula 3. The Chemical Equation 4. The Name of Chemicals
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3. The Chemical Equation
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chapter3tro - CHEMISTRY 161 Chapter 3 1 Structure of an...

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