5 (a) State two characteristic properties of metals - Edexcel - GCSE Chemistry Combined Science - Question 5 - 2018 - Paper 1
Question 5
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.
(c... 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
Metals are typically good conductors of electricity.
Metals generally have high melting and boiling points.
Step 2
Give the name of the acid used to make chlorides.
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Answer
Hydrochloric acid (HCl) is used to make chlorides.
Step 3
Describe the test to show that the gas is hydrogen.
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Answer
To test for hydrogen, a lit splint should be held at the mouth of the test tube. If hydrogen is present, a 'pop' sound will be heard.
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 from its outer shell. This loss of electrons results in a positive charge, as the number of protons now exceeds the number of electrons. The electron configuration changes, leading to a more stable electronic arrangement.
