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3.4 Unit 2 Chemistry 2
Throughout this unit candidates will be expected to write word equations for reactions
specified. Higher tier candidates will also be expected to write and balance symbol
equations for reactions specified throughout the unit.
C2.1 Structure and bonding
Simple particle theory is developed in this unit…

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Page 4

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GCSE Chemistry - version 2.0 ­ For first certification June 2013

Subject content Additional guidance
C2.1.1 Structure and bonding
a) Compounds are substances in which atoms of
two or more elements are chemically combined.
b) Chemical bonding involves either transferring
or sharing electrons in the highest occupied energy levels (shells)…

Page 5

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should be able to recognise simple molecules and giant structures , Cl
2

,O
2

, HCl, H
2

O, NH
3

and CH
4

.
from diagrams that show their bonding. Others
have giant covalent structures (macromolecules), such as diamond and silicon dioxide.
h) Metals consist of giant structures…

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Page 7

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GCSE Chemistry - version 2.0 ­ For first certification June 2013

Suggested ideas for practical work to develop skills and understanding include the following:
· molecular modelling
· modelling electron transfer and electron sharing using computer simulations
· Group 1 and Group 7 reactions, eg sodium with chlorine
· the…

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comparison with covalent bonds.
c) Substances that consist of simple molecules
do not conduct electricity because the molecules do not have an overall electric charge.

Page 9

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Page 10

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GCSE Chemistry - version 2.0 ­ For first certification June 2013

C2.2.2 Ionic compounds
a) Ionic compounds have regular structures
(giant ionic lattices) in which there are strong electrostatic forces in all directions between
oppositely charged ions. These compounds have high melting points and high boiling points
because of the…

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Pages in this set

Page 1

Preview of page 1

Page 2

Preview of page 2
3.4 Unit 2 Chemistry 2
Throughout this unit candidates will be expected to write word equations for reactions
specified. Higher tier candidates will also be expected to write and balance symbol
equations for reactions specified throughout the unit.
C2.1 Structure and bonding
Simple particle theory is developed in this unit…

Page 3

Preview of page 3

Page 4

Preview of page 4
GCSE Chemistry - version 2.0 ­ For first certification June 2013

Subject content Additional guidance
C2.1.1 Structure and bonding
a) Compounds are substances in which atoms of
two or more elements are chemically combined.
b) Chemical bonding involves either transferring
or sharing electrons in the highest occupied energy levels (shells)…

Page 5

Preview of page 5
should be able to recognise simple molecules and giant structures , Cl
2

,O
2

, HCl, H
2

O, NH
3

and CH
4

.
from diagrams that show their bonding. Others
have giant covalent structures (macromolecules), such as diamond and silicon dioxide.
h) Metals consist of giant structures…

Page 6

Preview of page 6

Page 7

Preview of page 7
GCSE Chemistry - version 2.0 ­ For first certification June 2013

Suggested ideas for practical work to develop skills and understanding include the following:
· molecular modelling
· modelling electron transfer and electron sharing using computer simulations
· Group 1 and Group 7 reactions, eg sodium with chlorine
· the…

Page 8

Preview of page 8
comparison with covalent bonds.
c) Substances that consist of simple molecules
do not conduct electricity because the molecules do not have an overall electric charge.

Page 9

Preview of page 9

Page 10

Preview of page 10
GCSE Chemistry - version 2.0 ­ For first certification June 2013

C2.2.2 Ionic compounds
a) Ionic compounds have regular structures
(giant ionic lattices) in which there are strong electrostatic forces in all directions between
oppositely charged ions. These compounds have high melting points and high boiling points
because of the…

Comments

No comments have yet been made