the covalent bond Flashcards

1
Q

covalent bond

A

a chemical bond that results from electron sharing ; the shared electrons are in the outer most energy levels

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2
Q

molecule

A

formed when 2 or more atoms bond covalently

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3
Q

true or false the majority of covalent bonds form between nonmetallic elements

A

ture

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4
Q

where does the most stable arrangement of atoms exist ?

A

at the point of maximum net attraction where atoms bond covalently

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4
Q

diatomic molecules

A

exist because the 2 molecules are more stable than the individual

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5
Q

lone pairs

A

unbounded pairs

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5
Q

single covalent bond

A

when only one pair of electrons is shared

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6
Q

bonding pair

A

the shared electron pair

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6
Q

lewis structure

A

used to represent the arrangement of electrons in a molecule , using dots or lines

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7
Q

group 17 and single bonds

A

the haloens have 7 valence electrons and form single covalent bonds with other nonmetals or halogens

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8
Q

group 16 and single bonds

A

can share 2 elections and form 2 covalent bonds to reach an octet

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8
Q

group 15 and single bonds

A

can form 3 single covalent bonds in order to reach an octet

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9
Q

group 14 and single bonds

A

can form 4 single covalent bonds in order to reach an octet

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9
Q

sigma bond

A

single covalent bond ; can be formed when a S orbital overlap S orbitals or P orbitals or when P orbitals overlap end to end

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10
Q

pi bond

A

formed when parallel orbitals overlap and share electrons

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11
Q

double bonds

A

forms when 2 pairs of electrons are shared between 2 atoms ; they consist of 1 pi bond and 1 sigma bond

12
Q

tripple bonds

A

forms when 3 pairs of electrons are shared between 2 atoms ; consist of 2 pi bonds and 1 sigma bond

13
Q

bond length

A

the position of maximum attraction. the strength of the bond depends on the distance between the nuclei and electrons

14
Q

bond disassociation energy

A

the amount of energy required to break a covalent bond and it is always positive

15
Q

endothermic

A

the required energy to break bonds

16
Q

exothermic

A

the energy released during bond formation