How many classes of metal can be divided based on reactivity!write
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4classes
Explanation:
The metals are often divided into four classes on the basis of their activity, as shown in the table below. The most active metals are so reactive that they readily combine with the O2 and H2O vapor in the atmosphere and are therefore stored under an inert liquid, such as mineral oil.
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4 classes of metal can be divided based on reactive
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