C.1.a. compounds

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Compounds
Atoms join together to make compounds. When different elements react, atoms form chemical bonds with other atoms to form compounds.
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How compounds form
Making bonds, involves atoms giving away, taking or sharing electrons. Only the electrons are involved, its nothing to do with the nuclei of the atom.
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Ions
A compound which is formed from a metal and a non-metal consists of ions. The metal atoms lose electrons to form positive ions and the non-metal atoms gain electrons to from negative ions. This is called IONIC BONDING.
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Covalent bonds
A compound formed from non-metals consists of molecules. Each atom shares an electron with another atom, which is called a COVALENT BOND. Each atom has to make enough covalent bonds to fill up its outer shell.
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Properties of a compound.
The properties of a compound is completely different to the properties of the original elements. For example, if iron and sulfur react, the compound formed (iron sulphide) is a dull grey solid lump, and doesn't behave anything like either element.
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Other cards in this set

Card 2

Front

Making bonds, involves atoms giving away, taking or sharing electrons. Only the electrons are involved, its nothing to do with the nuclei of the atom.

Back

How compounds form

Card 3

Front

A compound which is formed from a metal and a non-metal consists of ions. The metal atoms lose electrons to form positive ions and the non-metal atoms gain electrons to from negative ions. This is called IONIC BONDING.

Back

Preview of the back of card 3

Card 4

Front

A compound formed from non-metals consists of molecules. Each atom shares an electron with another atom, which is called a COVALENT BOND. Each atom has to make enough covalent bonds to fill up its outer shell.

Back

Preview of the back of card 4

Card 5

Front

The properties of a compound is completely different to the properties of the original elements. For example, if iron and sulfur react, the compound formed (iron sulphide) is a dull grey solid lump, and doesn't behave anything like either element.

Back

Preview of the back of card 5

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