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Oscar Chemistry > Unit1: Bonding > Flashcards

Unit1: Bonding Flashcards

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1
Q

What is a molecule?

A

A molecule is two or more atoms held together by a covalent bond

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2
Q

What is a covalent bond?

A

A covalent bond is a shared pair of electrons between two non metal atoms

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3
Q

What is a diatomic molecule made of?

A

A diatomic molecule is a molecule that contains two atoms only

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4
Q

Name all of the diatomic elements

A

Fluorine
Chlorine
Oxygen
Hydrogen
Nitrogen
Bromine
Iodine

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5
Q

Name 4 shapes of molecules

A

Tetrahedral
Angular
Linear
Trigonal pyramidal

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6
Q

What is an ionic bond?

A

An ionic bond is an electrostatic force of attraction between a positive and a negative non-metal

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7
Q

Is sodium chloride an ionic or covalent substance?

A

Ionic

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8
Q

Is carbon dioxide an ionic or covalent substance?

A

Covalent

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9
Q

Complete the following:
Ionic compounds have …….. melting points and ……. Boiling points

A

Ionic compounds have high melting points and high boiling points

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10
Q

Are ionic compounds soluble or insoluble in water?

A

Ionic compounds are soluble in water

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11
Q

Complete the following:
Ionic compounds conduct electricity but only when ……. Or in ……… because the ……………….. to move.

A

Ionic compounds conduct electricity but only when molten or in solution because the ions are free to move.

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12
Q

Name two types of covalent substances

A
  1. Discrete molecular substances
  2. Covalent network substances
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13
Q

Are covalent network substances soluble or insoluble in water?

A

Insoluble

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14
Q

Complete the following: covalent network substances have ……… melting and boiling points

A

Covalent network substances have very high melting and boiling points

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15
Q

Complete the following: covalent molecules have ….. melting points and boiling points

A

Covalent molecules have low melting and boiling points

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16
Q

Covalent network substances do not conduct electricity with the exception of ?

A

Graphite which has delocalised electrons

17
Q

Covalent molecules do not conduct electricity with the exception of?

A

Water

18
Q

Carbon dioxide is:
A. A covalent network
B. An ionic lattice
C. A covalent molecule

A

A. A covalent molecule

19
Q

Sodium chloride is:
A. A covalent network
B. An ionic lattice
C. A covalent molecule

A

B. An ionic lattice

20
Q

Diamond is:
A. A covalent network
B. An ionic lattice
C. A covalent molecule

A

A. A covalent network

Oscar Chemistry (3 decks)

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