Question

Out of the following metals
Copper, Aluminium, Mercury, Gold, Magnesium,
Calcium, Potassium, Silver, Sodium, Iron
How many metals can form hydrogen gas when
reacting with hydrochloric acid ?.
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Answer 1

Answer:

At a more theoretical level, the more reactive a metal, the greater tendency it has to form a positive ion (cation) by losing electrons in the context of a chemical reaction

e.g. for sodium Na ==> Na+ or iron Fe ==> Fe2+

The more reactive a metal, the more easily it loses electrons to form a positive ion, an electron loss is a process called oxidation.

Explanation:

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