Question

classify the following substance as metals or non-metals: copper, coal, zinc, aluminum ​

Answer 1

Answer:

Metals and Non-metals

Metals can be distinguished from non-metals on the basis of their physical and chemical properties. Recall that lustre and hardness are physical properties.You are familiar with a number of materials like iron, aluminium, copper, etc. Some materials have been given in Table. Metals are used in making machinery, automobiles, aeroplanes, buildings, trains, satellites, gadgets, cooking utensils, water boilers, etc.

Appearance and Hardness of materials

Object /Material Appearance Hardness

Iron Shiny Very hard

Coal Dull Not very hard

Sulphur Dull Not very hard

Aluminium Shiny Very hard

Copper Shiny Very hard

Physical Properties of Metals and Non-metals

Take a small iron nail, a coal piece, a piece of thick aluminium wire and a pencil lead. Beat the iron nail with a hammer. (But take care that you don’t hurt yourself in the process). Try to hit hard. Hit hard also the aluminium wire. Then repeat the same kind of treatment on the coal piece and pencil lead. Record your observations in a Table.

Answer 2

Answer:

copper is metal

coal is non metal

zinc is metal

alumnium is metal

Explanation:

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