. Name the three classes in which elements are classified. Which was the first metal used by man


(a) Name the three classes in which elements are classified. Which was the first metal used by man?

(b) Name the metal and non-metal present in abundance in the earth crust.

 

Best Answer

(a) Three classes in which elements are classified are:

Metals, Non-metals and Metalloids Copper was the first metal used by man.

(b) The metal which is present in abundance in earths crust is aluminium.

The non-metal which is present in abundance in the earth crust is oxygen.

 

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