Chemistry

sample deck

GCSE Chemistry: Chemical bonding

Ionic, covalent and metallic bonding and the properties they explain.

1. What are the three main types of chemical bond?

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   Ionic, covalent, and metallic.

2. Between which types of elements does ionic bonding occur?

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   Between a metal and a non-metal.

3. In ionic bonding, what happens to the metal atom?

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   It loses one or more electrons to become a positive ion.

4. Why do ionic compounds have high melting points?

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   Because the oppositely charged ions are held together by strong electrostatic forces of attraction in a giant lattice structure.

5. Why do ionic compounds conduct electricity when molten or dissolved?

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   Because the ions are free to move and carry charge.

6. Between which types of atoms does covalent bonding occur?

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   Between non-metal atoms.

7. In covalent bonding, atoms {share} pairs of electrons.

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   share

8. Why do simple molecular substances have low melting and boiling points?

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   Because they have weak forces between the molecules, even though the covalent bonds within molecules are strong.

9. What does 'delocalised electrons' mean in metallic bonding?

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   The electrons are free to move throughout the structure.

10. Why do metals conduct electricity and heat?

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    Because of the sea of delocalised electrons that are free to move throughout the structure.

11. What does 'malleable' mean when describing metals?

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    Metals can be hammered or bent into shape without breaking.

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