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A Level Edexcel Chemistry - Topic 2 - Bonding and Structure £7.49   Add to cart

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A Level Edexcel Chemistry - Topic 2 - Bonding and Structure

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A Level Edexcel Chemistry - Topic 2 - Bonding and Structure Fully updated notes providing drop down answers to self made questions designed from numerous textbooks and exam mark schemes. During my revision, I created these drop down questions and answers by extracting the key information need...

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  • December 26, 2022
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Topic 2 - Bonding and Structure
Ionic Bonding
Define ionic bond
strong electrostatic forces of attraction between oppositely charged ions

What are ions?

charged particles that are formed when an atom loses or gains electrons

Describe the two main factors that affect the strength of ionic bonding

1. IONIC RADIUS - Smaller ions pack closer together, electrostatic attraction gets
weaker with distance, therefore small, closely packed ions have stronger ionic
bonding

2. IONIC CHARGE - greater the ionic charge, stronger the ionic bonding

Why are ionic compounds soluble in water?

water has polar bonds

H+ and OH- these charges are able to attract charged ions

Describe the physical properties of ionic compounds

high MP

do not conduct when solid

brittle - can't be shaped → repulsion between ions

often soluble in water but INSOLUBLE in non polar solvents → tells you
particles are charged

Describe the trend in ionic radius down a group

Ionic radius increases down a group

Because down the group the ions have more shells of electrons



Topic 2 - Bonding and Structure 1

, Thus, the outermost electron experiences less pull from positive nucleus

Draw the dot and cross diagram to show ionic bonding in MgO




What are isoelectronic ions?

Isoelectronic ions are ions of different atoms with the same number of electrons

Describe the ionic radius of a set of isoelectronic ions with increases atomic
number

ionic radius decreases of a set of isoelectronic ions as atomic number increases

Electrons stay the same but protons increases

This means electrons are attracted to the nucleus more strongly

What are molecular ions?

molecular ions are covalently bonded atoms that lose or gain an electron

Which electrons are lost when an atom becomes an ion?

electrons in the highest energy level




Topic 2 - Bonding and Structure 2

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