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Flashcards in Bonding Deck (28):
1

Ionic bonding occurs between____ and ____.

Metals and non metals

2

Opposite ions formed in an ionic bind are attracted by

Electrostatic forces of attraction

3

Give three properties of ionic structures

High bp/mp the lattice must be broken
Conductive when molten or dissolved
Brittle ions may move when knocked

4

Covalent bonding occurs between

Two nine metals

5

Properties of a simple covalent structure

Low bp
Poor conductors

6

What is coordinate binding

1 atoms provides both the electrons
Lone pair

7

How does metallic bonding occur

Outermost electrons become delocalised and electrostatic forces of attraction occur between the nucleus and the electrons

8

The greater than_____ in a metallic bond the greater the strength

Charge

9

Why are metals malleable

Distortion leads to same electron environment

10

Define electronegativity

How good an element is at attracting electrons to its nucleus

11

Why is fluorine the most electronegative element

Best ratio of these things
Least levels
Most shielding
Highest nuclear charge

12

Electronegative atoms bonded produce

Delta charges

13

What are the three types of Inter molecular forces

Van der waals
Dipole dipole
Hydrogen binding

14

Dipoles are where two oppositely ______ molecules attract each other

Delta charged

15

How can polarity not lead to dipole dipole forces

If the shape of molecule cancels each other out

16

Explain van der walls forces

Electrons move everywhere
At some points a temporary dipole will be induced where electrons of different molecules are on opposing sides

17

True or false van der walls occurs in all molecules

True

18

The more_____ the stronger the van der walls forces

Electrons

19

How does hydrogen bonding occur

Very electronegative atom with a lone pair covakentky blinded to a hydrogen atom

20

What are the three elements that hydrogen bond

Oxygen
Fluorine
Nitrogen

21

Why is ice denser as a liquid

When frozen
To be held together without movement water molecules must move outwards slightly and so the density is reduced

22

What is the basis of why shapes of molecule occur

Electron pairs repel

23

Bond angle and name of a shape with two electron pairs

Linear
180

24

Name and angle of a shape with three electron pairs

Trigonal plannar
120

25

Name and shape of molecule with 4 pairs

Tetrahedral
109.5

26

Name and angle of molecule with 5 bonding pairs

90 or 120
Trigonal bypyramidal

27

What is the name and angle of a shape of molecule with 6 electron pairs

90
Octrahedral

28

Because lone pairs have_________ the bond angle is changed by ___

Stronger repulsion
2 degrees per pair