2-is a substance made up of two or more different elements in fixed ratio. Ex. H2O - CO2
Compound
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3-Is a force that join atoms together in a compound or an element.
Chemical bond
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4-Types of chemical bonds a-Ionic bonds – b-Covalent bonds – c-Metallic bonds d-all
d-all
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5-It is a bond formed between 2 non- metal atoms by sharing valence electrons to complete its outer shell
Covalent Bonds
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6-the type of bond when each atom share by no. of valence electrons equal to that needed to completes its outer shell to be stable as nearest inert gas.
Covalent Bond
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7-True or false : The more valence electrons that the two atoms share, the stronger the covalent bond formed
True
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8-Exists when 2 non metal atoms share 2 pairs of valence electrons.
double covalent bond
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9-True or false : Double bonds are stronger than single bonds.
True
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10-A triple covalent bond results in how many shared electrons?
3 pairs
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11-What is the type of this covalent bond ?
double covalent bond
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12-The bond between O2 is ……………………… & between N2 is ……………….……….. covalent
double - triple
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13-Which Compound would be classified as a covalent bond? a-HCl b-H2O c- both
c- both
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14-21-The number of _____ is most important in determining how an atoms will bond. Electron sin the
Valence Electrons
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15- A covalent bond in which electrons are shared unequally is: .............................
polar
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16-What happens to the electrons in a Nonpolar Covalent bond ?
