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OCR GCSE Chemistry Bonding

Bonding

This page covers the following topics:

There are three common types of bonding which hold atoms together. Ionic bonding is the electrostatic attraction between a positive metal ion and a negative non-metal ion. Covalent bonding is the sharing of electrons between two non-metal atoms. Metallic bonding is the electrostatic attraction between two metal ions and their delocalised electrons.

Types of bonding

Ionic bonds form between a metal cation and a non-metal anion. The metal transfers electrons to the non-metal, forming oppositiely charged ions. The electrostatic attraction between these two ions creates an ionic bond, which can be depicted using a dot-and-cross diagram.

Ionic bonding

Covalent bonds are the strongest of the three interatomic bonds. They arise from the sharing of a pair of electrons between two non-metal atoms, as shown in the dot-and-cross diagram

Covalent bonding

Metallic bonding arises from the electrostatic attraction between positive metal cations and negative delocalised electrons.

Metallic bonding

Dative covalent bonding involves the sharing of a pair of electrons between two atoms, but the electrons both originate from the same atom. The dative covalent bond is usually depicted as an arrow, illustrating where the shared electrons originate from.

Dative covalent bonding

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Draw a diagram depicting metallic bonding between atoms of lithium.

OCR GCSE Chemistry Bonding Draw a diagram depicting metallic bonding between atoms of lithium.
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2

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What ionic compound would oxygen and sodium form? Give your answer as a chemical formula.

OCR GCSE Chemistry Bonding What ionic compound would oxygen and sodium form? Give your answer as a chemical formula.
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3

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Ionic bonds form between which ions?

OCR GCSE Chemistry Bonding Ionic bonds form between which ions?
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4

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MgO is an ionic compound, what ions does it consist of?

OCR GCSE Chemistry Bonding MgO is an ionic compound, what ions does it consist of?
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5

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How are ions formed by group 1 and group 2 elements called?

OCR GCSE Chemistry Bonding How are ions formed by group 1 and group 2 elements called?
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6

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Which type of bonding is stronger, covalent, ionic or metallic?

OCR GCSE Chemistry Bonding Which type of bonding is stronger, covalent, ionic or metallic?
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7

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What kind of covalent bond does an Oβ‚‚ molecule have?

OCR GCSE Chemistry Bonding What kind of covalent bond does an Oβ‚‚ molecule have?
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8

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Phosphorus forms Pβ‚„ molecules. Explain why each P atom has 3 bonds in the Pβ‚„ molecule.

OCR GCSE Chemistry Bonding Phosphorus forms Pβ‚„ molecules. Explain why each P atom has 3 bonds in the Pβ‚„ molecule.
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9

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Why do metals have high melting points?

OCR GCSE Chemistry Bonding Why do metals have high melting points?
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10

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Are metallic bonds stronger or weaker than ionic bonds?

OCR GCSE Chemistry Bonding Are metallic bonds stronger or weaker than ionic bonds?
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