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Ions and how they are formed

Age 14-16 (KS4 / GCSE)

Excellent, clear and detailed illustration of how ions are formed. Explains bonding theory and electron structure. Includes several animated worked examples of positive and negative ion formation for different elements, plus test questions to aid understanding. Concludes with the formation of sodium chloride. Clear diagrams and animations throughout.



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Published 19 Feb 2008

Contributed by Barnaby Grimble — Experienced contributor City of London Academy (Southwark)

Average rating: 1 2 3 4 5

Others' feedback

Overall 1 2 3 4 5

Originality 1 2 3 4 5

Presentation 1 2 3 4 5

Content depth 1 2 3 4 5

Time saved 1 2 3 4 5

2 reviews

Jennifer Howes - Admin

This is a comprehensive resource, which includes a lots of detail about ion formation and is very clear. Excellent use of worked examples and questions really helps to consolidate pupils' understanding.

Useful? Yes / No 1 2 3 4 5

Gail Braz - Member

Very clearly set out and ideal for visual learners - great!

Useful? Yes / No 1 2 3 4 5

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Extracts from this resource

Ions

1(and how they are formed)Ionshttp://teachable.net/res.asp?r=6462Summary: The atom so far!The nucleus.
Dense: contains nearly all the mass of the atom in a tiny space.
Made up of protons and neutrons.
Has a positive charge because of the protons.
The electrons.
Exist thinly spread around the outside of the atom.
Very small and light.
Negatively charged.
Exist in layers called shells.
Can be lost or gained in chemical reactions.
3Ions and Electron StructuresIons are atoms that have either extra electrons added or electrons removed. e.g.So in ions the number of electrons no longer equals the number
of protons 4These are ions formed by the atom losing one or more electrons.
They are called cations. This is because during electrolysis they move towards the cathode.
The charge on the ions is equal to the number of electrons that the atom has lost.
In equations the charge is usually shown above and to the right of the symbol. (E.g. Mg2+ ).Positive Ions5These are ions formed by the atom

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