Unit 3 Chemistry Quiz

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22 Terms

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What is a Chemical Bond?

  • A force that holds 2 or more atoms together

  • also called “chemical compound”

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What are the 3 Types of Chemical Bonds? (From strongest to weakest)

  1. Metallic (Strongest)

  2. Ionic Bond

  3. Covalent Bond (Weakest)

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Metallic Bond:

  • chemical bond between 2 metals

  • strongest

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Ionic Bond

  • chemical bond between cations (metals) and anions (nonmetals)

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Covalent Bond

  • chemical bond between 2 non-metals (don’t forget HYDROGEN)

  • weakest

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What doesn’t bond?

Noble Gasses

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Binary Covalent Bonds:

2 nonmetals (binary = 2)

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1

mono

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2

di

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3

tri

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4

tetra

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5

penta

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6

hexa

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7

hepta

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8

octa

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9

nona

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10

deca

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Covalent Bond Definitions

  1. Sharing of valence electrons

  2. “molecule”

  3. octet rule: all elements want 8 VE

  • Helium is already a noble gas with 2 VE. Hydrogen wants to get 2 VE

  1. “Lewis Structure”:

  • can also be called a Lewis Dot Structure → picture that shows how electrons attach to each other

  1. electron pair: electrons exist in pairs

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Lone Pair

Electrons NOT SHARED with other elements

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Shared/Bonded Pair

Electrons SHARED with other elements

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What do you add when there is 1 extra picture line than the math

Double bond

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What do you add when there are 2 extra picture lines than the math

Triple bond