Chemical bonding Flashcards

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1
Q

Chemical bond

A

lasting attraction between atoms, ions or molecules that enables formation of chemical compounds

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2
Q

Covalent bond

A

Form of chemical bonding where pairs of e- shared between atoms

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3
Q

Valency

A

Number of e- lost or gained to have full outer shell

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4
Q

Properties of covalent

A

MP+BP generally lower than those of ionic compound, generally more flexible than ionic, generally not soluble water, generally do not conduct electricity when dissolved water

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5
Q

Non-polar covalent

A

Electronegativity difference = 0

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6
Q

Weak polar covalent

A

0<Electronegativity difference<1

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7
Q

Strong polar covalent

A

1<=Electronegativity difference<2.1

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8
Q

Ionic

A

Electronegativity difference>=2.1

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9
Q

Ionic bond

A

1 or more e- transferred from 1 atom to another

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10
Q

Properties of ionic compounds

A

Ions in lattice structure, ionic solids crystalline at room temp, often hard high MP, brittle, can’t conduct electricity as solids but can as ionic solns

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11
Q

Metallic bond

A

electrostatic attraction between positive charge atomic nuclei of metal atoms and delocalised sea of valence e- in metal.

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