Chemistry grade 10. Electron arrangement Chemical compounds are represented using chemical names and...
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Transcript of Chemistry grade 10. Electron arrangement Chemical compounds are represented using chemical names and...
![Page 1: Chemistry grade 10. Electron arrangement Chemical compounds are represented using chemical names and chemical formulas. To tell different compounds.](https://reader036.fdocuments.us/reader036/viewer/2022062321/56649da35503460f94a900c2/html5/thumbnails/1.jpg)
Chemistry grade 10
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Electron arrangement
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Chemical compounds are represented using chemical names and chemical formulas.
• To tell different compounds apart, each one is given a unique chemical name.
• Each chemical name can be translated into a chemical formula. A chemical formula is a group
of letters and subscript numbers that represent the make-up of a chemical compound.
The letters in the compound are the chemical symbols of the elements in the compound.
• The subscript numbers tell you how many atoms of these elements are in the compound.
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• Reactive elements can become more stable when they form compounds.
Sodium + Chlorine becomes sodium chloride
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Compounds
• When elements form compounds, they become more stable because when the elements combine to form compounds, each element makes a full outer electron shell.
• Metal elements lose electrons to form positive ions to become more stable.
• Non-metal elements can gain electrons to form negative ions OR non-metals can share electrons to become more stable.
• Ions are atoms that have either a positive electrical charge or a negative electrical charge.
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Binary Ionic compound
• A compound consists of a metal cation and non-metal anion.
• First part of the name always identifies the cation – usually a metal
• Second part of the name identifies the anion. Ends in the suffix “ide”
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Name Symbol
Fluoride F-
Chloride Cl-
Oxide O2-
Sulfide S2-
Nitride N3-
Phosphide P3-
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Elements in Ionic compound Name of Ionic compoundMagnesium and phosphorus Magnesium phosphideSodium and chlorine Sodium chlorideCalcium and bromine Calcium bromideAluminum and oxygen Aluminum oxide
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