12 Which gas is produced when metals
gas is produced when metals react with sodium hydroxide?
13. What is an element?
14. What are metalloids?
15, Arrange zinc, copper and iron in decreasing order of their reactivity.
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Hello friend❣️
Here's ur answer!!
✏️ Hydrogen gas will be produced.
✏️An element is a pure substance that is made from single substance or atom.
✏️A metalloids is a chemical substance that exhibits the property of both metals and nnon-metals.
✏️Zinc, Iron and Copper.
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Caesium, the most reactive metal in the periodic table, reacts extremely violently – hence why it can't be demonstrated in a classroom! This can be compared to other common metals, such as iron and copper, which produce no reaction when dropped into water.
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