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Lecture 6 > Covalent Bonding > Flashcards

Covalent Bonding Flashcards

1
Q

What are present in a lewis dot diagram?

A

the valence electrons

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2
Q

What is the ionic bond representing in the diagram?

A

The electrostatic attraction

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3
Q

What are covalent bonds?

A

sharing electrons in order to achieve an octet

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4
Q

What are covalent compounds?

A

Substance composed of atoms held together by covalent bonds
2 or more nonmetals bonded together

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5
Q

What is another word for covalent compounds?

A

molecules

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6
Q

What types of bonds do molecules have?

A

only have covalent bonds

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7
Q

What are the special covalent compounds, the diatomic molecules

A

H2, O2, F2, Br2, I2, N2, Cl2

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8
Q

What are the properties of molecules

A

Lower MP, BP than ionic compounds
Doesn’t conduct electricity
Can be found as solids, liquids, or gases

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9
Q

How is the number of bonds determined?

A

based on the number of addional electrons the element can take
(Ex. Carbon needs 4 to make a full octet, so it has 4 avaliable bonds)

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10
Q

What is a single bond

A

element sharing 2 electrons, can be represented by a single line or 2 dots

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11
Q

What is a double bond

A

sharing of 4 electrons, 4 dots or 2 lines

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12
Q

What is a modified dot diagram?

A

Shows the lines for the bonds and the dots for the non-bonding electrons

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13
Q

What is a triple bond?

A

sharing of 6 electrons, 6 dots or 3 lines

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14
Q

Out of the 3 types of covalent bonds, what is the order from longest to shortest?

A

single, double, triple

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15
Q

out of the 3 types of covalent bonds, what is the order from weakest to strongest

A

single, double, triple

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16
Q

How do you know the number of atoms present in a molecular compound?

A

A prefix will be added to the beginning of the element to signify the number

17
Q

What is the prefix for 1,2,3,4, and 5?

A

mono-
d-
tri-
tetra-
penta-

18
Q

What is the prefix for 6,7,8,9, and 10

A

hexa-
hepta-
octa-
nona-
deca-

19
Q

Covalent compound rules

A
  1. first nonmetal with proper prefix
  2. Give 2nd nonemetal proper prefix and change ending to -ide
20
Q

What is the exception for the Covalent compound naming rule?

A

The first element doesn’t need a prefix if there is only one element

21
Q

What is a covalent network solid

A

chemical compound in which the atoms are bonded by covalent bonds in a continuous network extending throughout the material

22
Q

What are the molecules like in a network solid?

A

There are no individual molecules

23
Q

What can the entire crystal/amorphous solid be considered?

A

macromolecule

24
Q

Formulas for network solids are

A

the simplest ratios of the component atoms represented by a formula unit

25
Q

Covalent network solid properties

A

very hard, high MP, poor conductors, not soluble

Lecture 6 (6 decks)

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