Chemistry C1 1.4 Forming bonds.

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What do compounds of metals bonded to non-metals have?
Ionic bonds.
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What does the formula of an ionic compound show?
The simplest ratio of ions.
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What do compounds of non-metals have?
Covalent bonds.
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What does the formula of a molecule show?
The number of atoms in the molecule.
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What do different elements form when they combine?
Compounds.
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What is formed when a metal reacts with a non-metal?
Ions.
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When ions are formed, what happens to the metal atoms?
They lose one or more electrons to form positively charged ions.
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When ions are formed, what happens to the non-metal atoms?
They gain electrons to form negatively charged ions.
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When ions are formed, what happens?
The oppositely charged ions attract each other strongly and the compound has ionic bonds.
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What does the chemical formula of an ionic compound tell us?
The simplest ratio of ions in the compound.
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What does the chemical formula NaCl show us?
That sodium chloride is made from equal numbers of sodium ions and chloride ions.
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Wha happens when non-metals combine?
Their atoms share electrons to form covalent bonds and molecules are formed.
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What does the chemical formula of a molecule tell us?
The number of atoms that have bonded together in the molecule.
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What does H_(2)O show us?
That a water molecule contains two hydrogen atoms and one oxygen atom.
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How can covalent bonds be shown when written?
As lines between the atoms that are bonded together.
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What are examples of compounds with ionic bonds?
Any metal and non-metal compound such as sodium chloride, magnesium oxide.
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Wha does the formula CaCl_(2) tell us about the compound calcium chloride?
Made from one calcium ion for every two chloride ions.
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What does the formula C_(3)H_(8) tell us about the compound propane?
It is made from three carbon atoms and eight hydrogen atoms.
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**THE FORMULA FOR IONIC COMPOUNDS AND METALLIC ELEMENTS IS THE SIMPLEST POSSIBLE RATIO, SUCH AS MgCl_(2) OR NaCl****
***FOR SUBSTANCES MADE OF MOLECULES THE FORMULA SHOWS THE NUMBER OF ATOMS IN THE MOLECULE, SUCH AS O_(2) OR C_(2)H_(6)****
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**CHECK OUT DIAGRAMS OF BONDS AND HOW THEY ARE WRITTEN***
** LOOK AT BOTH IONIC BONDING AND COVALENT BONDING DIAGRAMS***
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Card 2

Front

What does the formula of an ionic compound show?

Back

The simplest ratio of ions.

Card 3

Front

What do compounds of non-metals have?

Back

Preview of the front of card 3

Card 4

Front

What does the formula of a molecule show?

Back

Preview of the front of card 4

Card 5

Front

What do different elements form when they combine?

Back

Preview of the front of card 5
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