plz answer the questions of physics 8th std urgent plz
Answers
Answer:
1) Malleability is a property of a material by which it can be beaten to form Its thin sheets. Two most malleable metals are silver and gold
2) Metals contain free electrons. When potential difference is applied at the ends of a metal rod, the electrons respond to it and start moving towards the positive terminal, of battery. This flow of electrons result in the conduction of electricity through the metal.
3) Metals are lustrous, malleable, ductile, good conductors of heat and electricity. Other properties include state- metals are solud at room temperature with the exception of mercury, which is liquid at room temperature.
4) Typical non-metals have a dull, coloured or colourless appearance, are brittle when solid, are poor conductors of heat and electricity and have acidic oxides.
5) The ribbon burns with a bright white lightlight. Intense heat is also produced in this reaction. Here, when magnesium burns, it reacts with the oxygen found in air to form a powdery ash called magnesium oxide. Chemical equation- magnesium plus oxygen gives magnesium oxide.
6) Copper forms a green deposit on its surface when exposed to air which is usually a mixture of copper carbonate and copper hydroxide.
Explanation:
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Answer:
answer 5.
The ribbon burns with a bright white light. Intense heat is also produced in this reaction. Here, when magnesium burns, it reacts with the oxygen found in air to form a powdery ash called magnesium oxide.
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