8 (a) State two characteristic properties of metals - Edexcel - GCSE Chemistry - Question 8 - 2018 - Paper 1
Question 8
8 (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:8 (a) State two characteristic properties of metals - Edexcel - GCSE Chemistry - Question 8 - 2018 - Paper 1
Step 1
State two characteristic properties of metals.
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Answer
Metals have high melting points, making them suitable for a variety of applications.
Metals are good conductors of electricity, allowing them to be used in electrical wiring.
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 should apply a lighted splint to the gas. If hydrogen is present, it will produce a characteristic 'pop' sound.
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 electron configuration of a neutral nickel atom is [Ar] 3d⁸ 4s². When it loses two electrons to form Ni²⁺, it will have the configuration of [Ar] 3d⁸, with a positive charge due to the loss of the two 4s electrons.
