Differentiate between metals and non-metals on the basis of the following physical properties : a. Malleability b. Conductivity c. Lustre
Answers
Answer:
Metals are malleable and ductile whereas non metals are brittle and can break down into pieces. We will see more difference on the basis of their physical properties in the complete answer below. Metals are very hard except for sodium. ... Metals are good conductors of heat and electricity.
Explanation:
State: Most of the metals are found in solid state at normal temperature except mercury (Hg) which is found in liquid state at normal temperature. (b) Colour: Mostly metals are grey in colour. (c) Lustre: Most of the metals are lustrous. They are capable of reflecting rays of light from their upper surface therefore, they are lustrous such as gold, silver, copper, aluminium. (d) Hardness: Most of the metals are hard. Hardness of different metals are different. Sodium and potassium are less hard compared to other metals. (e) Sonorous: When metals are struck with other hard metals or objects then a special sound is produced, this property is called sonorous. Due to this property of metals they are used to manufacture bell and music instrument etc. (f) Density: Generally metals have high density. Things made of metals are heavy so when they put in water they sink while those have less density will float in water such as sodium (Na) and potassium (K) etc. (g) Melting Point: That temperature at which solid changes into liquid state is called melting point of that object. Due to hardness of solid their melting point is high such as iron (Fe). The melting point of iron is 1593°C while galium is exception it melts just by putting it on hand palm as its melting point is very low. (h) Heat conductivity: When a rod of steel is heated, after sometimes it becomes hot while a wooden rod when submerged in hot water does not get heated. Silver (Ag) is the best conductor while lead (Pb) is the least conductor. This is the reason that cooking utensils are made of metals and their handles are made of non-conductors like wood, plastic etc. Malleability: Metals are spread on beating. Hence by the force of hammers they are converted into sheets. Ductility: When they are stretched, convert into wires. This property of metals is called ductility.Read more on Sarthaks.com - https://www.sarthaks.com/782255/differentiate-between-metals-and-non-metals-on-the-basis-of-their-physical-properties