What happens when metals react with non-metals?
Metals lose electrons to form cations, while non-metals gain electrons to form anions. The electrostatic attraction between these oppositely charged ions results in the formation of an ionic bond.
Why is copper used for electrical wiring instead of iron?
Copper is a better conductor of electricity than iron and is also more resistant to corrosion.
Why does sodium react vigorously with water?
Sodium reacts vigorously with water because it is highly reactive and forms sodium hydroxide and hydrogen gas in an exothermic reaction.
What is an amphoteric oxide?
An amphoteric oxide is a metal oxide that can react with both acids and bases to form salts and water. Examples include aluminum oxide (Al₂O₃) and zinc oxide (ZnO).
Why do metals form basic oxides?
Metals form basic oxides because they react with oxygen to produce compounds that can neutralize acids.
Why are electrical wires coated with plastic or rubber?
Plastic or rubber is used as an insulating material to prevent the electric current from escaping and causing shocks.
What is the most ductile metal?
Gold is the most ductile metal. A single gram of gold can be drawn into a wire over 2 kilometers long.
Why are non-metals brittle?
Non-metals are brittle because they have a covalent bond structure, which makes them break easily under stress.
What is the reactivity series of metals?
It is a list of metals arranged in the order of their reactivity, from the most reactive (potassium) to the least reactive (gold).
What is the difference between metals and non-metals in terms of their physical properties?
Metals are malleable, ductile, and good conductors of heat and electricity, while non-metals are brittle, poor conductors, and generally lack luster.
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