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as chemistry (sme) > 1.4.3 Covalent Bonding > Flashcards

1.4.3 Covalent Bonding Flashcards

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1
Q

Covalent bonding occurs between

A

two non-metals

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2
Q

A covalent bond involves

A

the electrostatic attraction between nuclei of two atoms and the bonding electrons of their outer shells

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3
Q

No electrons are transferred but only

A

shared

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4
Q

The positive nucleus of each atom has an attraction for the bonding electrons shared in the covalent bond diagram

A
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5
Q

Non-metals are able to

A

share pairs of electrons to form different types of covalent bonds

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6
Q

Sharing electrons in the covalent bond allows

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each of the 2 atoms to achieve an electron configuration similar to a noble gas, tyhis makes each atom more stable

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7
Q

Covalent Bonds & Shared Electrons Table

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8
Q

Covalent bonding in hydrogen

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9
Q

Covalent bonding in chlorine

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10
Q

Covalent bonding in hydrogen chloride

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11
Q

Covalent bonding in ammonia

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12
Q

Covalent bonding in methane

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13
Q

Covalent bonding in ethane

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14
Q

Covalent bonding in oxygen

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15
Q

Covalent bonding in carbon dioxide

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16
Q

Covalent bonding in ethene

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17
Q

Covalent bonding in nitrogen

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18
Q

In some instances, the central atom of a covalently bonded molecule can accommodate

A

more or less than 8 electrons in its outer shell

19
Q

Being able to accommodate more than 8 electrons in the outer shell is known as

A

expanding the octet rule

20
Q

Accommodating less than 8 electrons in the outer shell means than the central atom is

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electron deficient

21
Q

Some examples of this occurring can be seen with

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period 3 elements

22
Q

Sulfur dioxide, SO2 – dot and cross diagram

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23
Q

Phosphorus pentachloride, PCl5 – dot and cross diagram

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24
Q

Sulfur hexafluoride, SF6 – dot and cross diagram

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as chemistry (sme) (14 decks)

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