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Flashcards in Electrons and bonding Deck (11):
1

Define electronegativity

Ability to attract bonded electron in covalent bond

2

Greater difference=

ionic

3

Whats the electron pair repulsion theory?

Electrons repel one another as far as possible
Shape depends on electron pairs
L-L>L-D>D-D

4

Shapes

Trig planar-180
Tetra - 109.5
Trig bipyradmidal - 90 and 120
Octa - 120
Pyramidal - 107
Angular - 104.5

5

Define polar bond

Covalent bond between two atoms with different electronegativites in which bonded electron pair is drawn closer to more electronegative atom

6

Which shapes cancel dipoles out?

Trig planar, tetra, tri by, octa

7

Define permanent d-d

Between polar molecules

8

Define induced d-d

Weakest and in all

9

How is induced d-d formed?

Movement of electron= instanstaneous dipole which induces another dipole in neighbouring atom
attraction between temporary induced dipoles = dipole -dipole

10

Define H bond

Bonded to lone pair on N, F and O
highest

11

Water

Ice is less dense due to open lattic
high MP