Physical Properties of Metals & Non-Metals Video Lecture - Science Class

0:0:0: take a look at the visuals we are about
0:0:2: to show you and see if you can separate
0:0:4: the metals from the
0:0:5: non-metals ready let's
0:0:9: start as you watch the visuals pay close
0:0:12: attention to the appearance some of them
0:0:15: are shining and some are quite dull this
0:0:18: shininess in metals separates them from
0:0:21: non-metals there are more such physical
0:0:23: properties that separate metals from
0:0:25: non-metals which we will discuss in this
0:0:28: video the main main physical properties
0:0:31: are luster thermal and electrical
0:0:33: conductivity ductility malleability
0:0:36: density melting and boiling points
0:0:41: sonority let's begin with the first
0:0:43: physical property that is luster the
0:0:47: shininess in metals is known as
0:0:49: luster this property makes metals like
0:0:52: gold ideal for jewelry currency and
0:0:54: decorative items in contrast non-metals
0:0:58: lack this property of shininess or
0:1:1: luster their dull appearance makes them
0:1:3: practical choices for applications like
0:1:6: pencils and
0:1:7: matches it's essential to note that not
0:1:10: all metals exhibit High luster for
0:1:13: instance metals like manganese and
0:1:15: bismut can appear dull despite being
0:1:18: Metals now what do you think which of
0:1:21: the two metals or non-metals is used in
0:1:24: the wires around your
0:1:27: house yes you guessed it right metals
0:1:30: are used in the
0:1:32: wires this is because of the high
0:1:34: conductivity in metals metals are great
0:1:37: conductors of electricity and even Heat
0:1:41: this property finds applications in
0:1:43: electrical wiring power transmission and
0:1:45: electronic
0:1:47: components now let's bring the concept
0:1:49: of thermal conductivity to life take a
0:1:52: metal rod plamp this rod on a
0:1:56: stand fix a PIN to the free end of the
0:1:59: rod used using wax heat the metal rod
0:2:2: with a spirit lamp candle or a burner
0:2:4: near the place where it is
0:2:7: clamped what do You
0:2:9: observe you will observe that the wax
0:2:12: melts and the pins fall down
0:2:13: demonstrating how efficiently metals can
0:2:16: conduct thermal
0:2:18: energy non-metals on the other hand have
0:2:21: poor electrical conductivity and heat
0:2:24: transfer this makes them suitable as
0:2:27: insulating materials for covering
0:2:28: electrical WI
0:2:31: but some materials like Silicon and
0:2:33: germanium are exceptions to the
0:2:35: conductivity rule they are
0:2:38: semiconductors exhibiting conductivity
0:2:40: between that of metals and non-metals
0:2:42: and are important in electronic
0:2:46: devices just like we said metals like
0:2:49: copper are used as electrical wires so
0:2:53: to convert metals from their original
0:2:55: form to thin wires they possess a
0:2:57: special property called ductility
0:3:0: also metals can be beaten Into Thin
0:3:2: sheets and this property is called
0:3:5: malleability this property finds
0:3:7: applications in construction Aerospace
0:3:10: and
0:3:11: Manufacturing whereas non-metals tend to
0:3:14: break if
0:3:15: hammered this is called
0:3:17: brittleness when stress is applied these
0:3:20: bonds inside non-metals break resulting
0:3:23: in a brittle fracture rather than
0:3:25: molding this brittleness makes them
0:3:27: suitable for applications like
0:3:29: fertilizers and
0:3:31: matches while it's uncommon some metals
0:3:34: can be brittle for example certain
0:3:37: conditions can make certain Alloys like
0:3:40: cast iron susceptible to
0:3:42: brittleness imagine you have equal
0:3:45: volumes of a metal and non-metal in your
0:3:47: hands which one do you think will be
0:3:49: heavier let me help you out the high
0:3:52: density of metals will be the reason why
0:3:54: the metal will be heavier veras lower
0:3:57: density of non-metals will make make
0:3:59: them lighter this property makes metals
0:4:3: like lead ideal for applications as
0:4:5: weights metals also possess much higher
0:4:8: melting points and boiling points than
0:4:10: the
0:4:11: non-metals this makes metals like
0:4:13: tungsten and titanium suitable for
0:4:15: applications in aerospace engineering
0:4:18: and high temperature
0:4:19: manufacturing some metals like Mercury
0:4:22: deviate from the trend with low melting
0:4:25: and boiling points Mercury's unique
0:4:28: properties make it suitable for
0:4:29: applications in thermometers and
0:4:32: barometers metals are also used in the
0:4:35: manufacturer of most of the music
0:4:37: instruments why because they have a
0:4:40: property of sonority which means that
0:4:43: they produce sound like if struck with
0:4:46: something whereas non-metals are non-s
0:4:50: sonorous so concluding the session we
0:4:53: learned that metals and non-metals have
0:4:56: very different physical
0:4:58: properties metals are lustrous whereas
0:5:0: non-metals are non-
0:5:2: lustrous on one side metals have great
0:5:5: thermal and electrical conductivity
0:5:7: whereas non-metals have poor
0:5:9: conductivity metals can be hammered Into
0:5:12: Thin sheets and drawn into wires that is
0:5:14: they're malleable and ductile while
0:5:17: non-metals are neither malleable nor
0:5:19: ductile rather are brittle metals have
0:5:22: high density and nonmetals have low
0:5:25: density metals have higher melting and
0:5:27: boiling points but non-metals have lower
0:5:29: melting and boiling
0:5:31: points lastly metals are sonorous and
0:5:34: non-metals are nons
0:5:36: sonorous we hope that you have
0:5:38: understood the concept of physical
0:5:40: properties of metals and
0:5:42: non-metals now here's a secret on how
0:5:45: you can study effectively with the urv
0:5:48: app you can learn with chapter notes
0:5:51: watch video lectures and solve McQ tests
0:5:54: of this chapter on
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0:5:58: amazing courses for class 10 and much
0:6:1: more for your class 10
0:6:3: preparation thank you