C4 Structure Entité Chimique Flashcards

1
Q

Shema de Lewis

A

Schéma representantvles e- de valence des atomes , il indique les doublets liant et non liant des atomes

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2
Q

Lacune électronique

A

Doublet e- manquant a une entité pour acquérir une structure électronique stable

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3
Q

Règle de répulsion maximale

A

Du fait de leur charge électrique, les doublet liants et non lant se repoussent

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4
Q

Forme molécule 4 atomes

A

Tetraédrique

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5
Q

Forme molécule 3 atomes+1 doublet non liant

A

Pyramidale

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6
Q

Forme molécule 2 atomes +2 doublet non liant

A

Coudée

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7
Q

Forme molécule 3 atomes

A

Triangulaire plane

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8
Q

Forme molécule 2 atomes

A

Linéaire

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9
Q

A=X=A

A

Linéaire

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10
Q

Electronegativité

A

Grandeur sans unité caractérisant la capacité d’1 atome à attirer des liaisons dans lesquel il est engagé

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11
Q

X(a)-X(b)>1.7

A

Ionique :
+ Electronegatif capte la totalité Doublet : 2 atomes deviennent des ions

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12
Q

0.4< X(a)-X(b) <1.7

A

Covalente polaire
Molécule globalement neutre

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13
Q

0< X(a)-X(b) <=0.4

A

Covalente à polaire
Relie 2 atomes
Équitable repartie

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14
Q

Pont hydrogene

A

H et FON
pointillés

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15
Q

Van der Waals permanente

A

Molécule polaire

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16
Q

Van der Waals induite

A

Molécule apolaire

17
Q

Interaction Coulomb

A

Liaison ionique

18
Q

Interaction d’une molécule polaire

A

Van der Waals permanente

19
Q

Interaction d’une molécule apolaire

A

Van der Waals entre charges induite