MEDIUM
AS and A Level
IMPORTANT
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Which one of these statement about the electrons in the outermost principal quantum shell of phosphorus(atomic number 15) is true? 

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Important Questions on Electrons in Atoms

MEDIUM
AS and A Level
IMPORTANT
Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 2 - Electrons in Atoms>Question>Q 10
Write the electronic configuration for the following ions Al+3(Z=13).
MEDIUM
AS and A Level
IMPORTANT
Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 2 - Electrons in Atoms>Question>Q 10
Write the electronic configuration for the following ions O2-(Z=8).
MEDIUM
AS and A Level
IMPORTANT
Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 2 - Electrons in Atoms>Question>Q 10
Write the electronic configuration for the following ions Fe+2(Z=26).
MEDIUM
AS and A Level
IMPORTANT
Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 2 - Electrons in Atoms>Question>Q 10
Write the electronic configuration for the following ions Cu2+(Z=29).
MEDIUM
AS and A Level
IMPORTANT
Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 2 - Electrons in Atoms>Question>Q 10
Write the electronic configuration for the following ions Cu+(Z=29).
MEDIUM
AS and A Level
IMPORTANT
Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 2 - Electrons in Atoms>Question>Q 11
Explain why the value for the ionic radii for the negative ions in the period 3 are higher than the ionic radii for the positive ions.
MEDIUM
AS and A Level
IMPORTANT
Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 2 - Electrons in Atoms>Question>Q 11
Sketch a graph to show how the ionic radius changes across period 3.
MEDIUM
AS and A Level
IMPORTANT
Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 2 - Electrons in Atoms>Questions>Q 12
The first ionization energies of four consecutive elements in the periodic table are : 
Sodium =494 KJmol-1 
Magnesium=736 KJmol-1 
Aluminium =577 KJmol-1 
Silicon=786 KJmol-1

Explain the general increase in ionisation energy from sodium to Silicon.