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5 (a) State two characteristic properties of metals - Edexcel - GCSE Chemistry Combined Science - Question 5 - 2018 - Paper 1

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5 (a) State two characteristic properties of metals. property 1 property 2 (b) Acids are used to make salts. Give the name of the acid used to make chlorides. (... show full transcript

Worked Solution & Example Answer:5 (a) State two characteristic properties of metals - Edexcel - GCSE Chemistry Combined Science - Question 5 - 2018 - Paper 1

Step 1

State two characteristic properties of metals.

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Answer

  1. Metals are typically good conductors of electricity.
  2. Metals have high melting and boiling points.

Step 2

Give the name of the acid used to make chlorides.

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Answer

The acid used to make chlorides is hydrochloric acid (HCl).

Step 3

Describe the test to show that the gas is hydrogen.

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Answer

To test for hydrogen gas, you can conduct the 'pop test.' This involves collecting the gas in a test tube and bringing a lit splint near the mouth of the test tube. If the gas is hydrogen, it will produce a distinctive 'pop' sound as it ignites.

Step 4

Explain how the structure of a nickel atom, Ni, changes when it forms a nickel ion, Ni²⁺.

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Answer

When a nickel atom (Ni) forms a nickel ion (Ni²⁺), it loses two electrons. The atomic structure of nickel has 28 electrons, and when it loses two, it has a total of 26 electrons. This loss of electrons results in a positive charge of +2 for the nickel ion.

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