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Flashcards in Bonding Deck (50):
0

What are the two types of element?

Metal and non-metal atoms

1

What combination of elements make up an IONIC BOND?

Metal + Non-metal

2

What combination of elements make up a COVALENT BOND?

Non-metal +non-metal

3

What combination of elements makeup a METALLIC BOND?

Metal + Metal

4

Give an example of two metals that could make up an ionic bond...

Sodium. + chlorine
Highly reactive. Highly reactive
Grey metal Green gas

5

What is the electron configuration of sodium (Na) + Chlorine (cl) in terms of an IONIC BOND?

Na; 2:81 Cl; 2:8:7
To
Na; 2:8 Cl; 2:8:8

6

What happens when atoms transfer in a IONIC BOND? (In terms of ions)

Opposite ions attract
ELECTROSTATICALLY to form a 3D crystalline lattice.

7

Give the electron configuration of Magnesium + Oxygen in terms of IONIC BONDING...?

Mg (2+); 2:8:2 O (2-); 2:6
To
Mg; 2:8 O; 2:8

8

Give the definition of an IONIC BOND?

Electrostatic attraction between oppositely charged ions.

9

How are atoms electrically neutral?
(What do they have?)

Equal numbers of protons and electrons.

10

Why are the Nobel gasses so stable?

They have full outer shells.

11

What kind of bonding is this:
Losing or gaining electrons?

IONIC BONDING

12

What kind of bonding is this:
Sharing electrons?

COVALENT BONDING

13

In general, NON-METALS......

Gain electrons to form anions

14

Give the definition of a co-valent bond?

The electrostatic force of attraction BETWEEN 2 NUCLEI AND A SHARED PAIR OF ELECTRONS.

15

Give the line diagram and formulae for:
Hydrogen

H - H

H2

16

Give the line diagram and formulae for:
Chlorine

Cl - Cl

Cl2

17

Give the line diagram and formulae for:
Hydrogen chloride

H - Cl
HCl

18

Give the line diagram and formulae for:
Water

H - O - H
H2O

19

Give the line diagram and formulae for:
Ammonia

H - N - H
I
H

NH3

20

Give the line diagram and formulae for:
Methane

H
I
H - C - H
I
H

Ch4

21

Give the line diagram and formulae for:
Oxygen

O = O

O2

22

Give the line diagram and formulae for:
Nitrogen

O(-x3) O

N2

23

Give the line diagram and formulae for:
Carbon dioxide

O=C=O

CO2

24

What two structures are there within covalent bonding?

-Simple molecular covalent
-Giant molecular covalent

25

What are the TWO properties that simple molecular covalent has?

-usually liquids or gasses at R.T.P
-very low melting points and boiling points

26

What kind of FORCES are simple molecular covalent molecules held together by?

-very weak forces
-vonder waals forces
-intermolecular forces

27

What are the THREE properties that go with Giant Molecular Covalent bonding?

-Solids at room temp
-v high melting and boiling points
-strong forces which requires a large amount if energy to break the strong covalent bond la throughout the lattice

28

Give the definition and three examples of Giant molecular covalent bonding...?

-giant 3D lattice (molecule) with covalent bonds throughout
E.g's •Carbon Diamond
•Carbon Graphite
•Silicon Dioxide

29

In an ionic bond, the metal atom....

Losses electrons

30

In ionic bonding, non metal atoms......

Gain electrons

31

What are Oxidations and Reduction?

Oxidation Is the Loss of electrons
Reduction Is the Gain of electrons
OIL RIG

32

What charge do metal ions have?

M+

33

What charge do non-metal ions have?

X-

34

In both metal and non-metal ions, the size of the charge=

Valency

35

Valency=

Number of electrons in the outer shell

36

In non-metals the valency=

8- the no. Of electrons on the outer shell.
e.g. O= 2.6 O2-= 2.8

37

Groups 1,2,3=

METAL

38

Groups 5,6,7=

NON-METAL

39

What are the 2 properties of an ionic compound?

High melting and boiling points.

40

What do dot and cross diagrams show?

The outer shell of electrons only

41

What is SIMPLE MOLECULAR COVALENT

Two or more NON-METAL atoms
(Not carbon Diamond carbon graphite and Silicon diamond)

42

Cl2(g), H2O(l), CO2(g) are all examples of .....

Simple molecular covalent compounds

43

What are the two different types of forces in simple molecular Covalent?

INTRAmolecular Bonding:Covalent
(bonds INSIDE the molecule bonding atoms together)
INTERmolecular FORCES:Weak Forces
(Van der Waal's forces of attraction BETWEEN molecules)

44

A METALLIC BOND....

is the electrostatic force of attraction between 2 cations and the delocalised electrons between them.

45

The METALLIC STRUCTURE.....

is the close packed, regular arrangement of CATIONS surrounded by a SEA of DELOCALISED ELECTRONS.

46

What are the 2 properties of metals?

MALLEABLE: can be hammered into shape or bent and it retains shape
ELECTRICAL CONDUCTIVITY: metals conduct electricity

47

Explanation of: malleable and ductile

•layers of cations can move over each other
•and still retain attraction to the delocalised sea of electrons

48

Explanation of: conduct electricity

•metals have a delocalised sea of electrons
•delocalised sea of electrons are FREE to move
•movement of electrons is the conduction of electricity

49

Explanation of: high melting point and boiling point

•metals have STRONG METALLIC BONDS
•hence a large amount of energy is required to brake these bonds