Question

Appearance(Shiny/Dull) and Hardness (Very hard
/ Not very hard) of Pencil lead

Answer 1

Answer:

Objective

This topic gives an overview of;

Metals and Non-metals

Physical Properties of Metals and Non-metals

Chemical Properties of Metals and Non-metals

Reaction with Oxygen

Reaction with Water

Reactions with Acids

Reactions with Bases

Displacement Reactions

Uses of Metals and Non- metals

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.

Answer 2

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