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 what is metal and non metal?

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https://www.meritnation.com/ask-answer/question/two-difference-between-metal-non-metal/materials-metals-and-non-metals/2667986

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 metal is a substance which donates electrons

and gains plus charge and contain mainy free electrons so is the good conductor of electricity

 

non metal accepts electrons and gains minus charge

and does not contain free electrons so is the bad conductor of electicity

 

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metal is a substance having valence electrons but non metals do not have except graphite.

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Metal are those elements which dotnes electrons to be octate state and non metal are those elements which receives electrons to be octate state.

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Chemical Properties
Metals
Nonmetals
Physical Properties
Metals
Nonmetals
  • Good electrical conductors andheat conductors.
  • Malleable - can be beaten into thin sheets.
  • Ductile - can be stretched into wire.
  • Possess metallic luster.
  • Opaque as thin sheet.
  • Solid at room temperature (except Hg).
  • Poor conductors of heat and electricity.
  • Brittle - if a solid.
  • Nonductile.
  • Do not possess metallic luster.
  • Transparent as a thin sheet.
  • Solids, liquids or gases at room temperature.
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Elements can be classified as metals or non-metals on the basis of their properties.

Physical properties include:

  • appearance
  • density
  • melting and boiling point
  • conductivity of heat and electricity
  • tensile strength (resistance to bending)
  • malleability (ability to roll into sheets)
  • ductility (ability to draw into a wire)

Chemical properties include:

  • charge on ions formed from the element
  • type of bonding found in the element's oxides and chlorides
  • pH of the element's oxide

Metals are found on the left hand side of the Periodic Table while non-metals are found on the right hand side.

Properties of Metallic and Non-Metallic Elements

Property Metallic Elements Non-Metallic Elements
Appearance
(physical property)		 lustrous dull
Density
(physical property)		 moderate to high low to moderate
Physical State
(25oC, 101.3kPa)
(physical property)		 solid (except liquid mercury) solid, liquid or gas
Melting and Boiling Point
(physical property)		 moderate to high wide range
Heat and Electrical Conductivity
(physical property)		 good poor (except graphite)
Tensile Strength (resistance to bending)
(physical property)		 high brittle
Malleability (roll into sheets)
(physical property)		 malleable not malleable
Ductility (draw into wire)
(physical property)		 ductile not ductile
Charge on Ions (in general)*
(chemical property)		 forms positive ions forms negative ions
Bonding in oxides and chlorides
(chemical property)		 usually ionic** covalent
pH of oxides
(chemical property)		 usually basic*** usually acidic

*some non-metals can form positive or negative ions, eg, H+ and H-
**some metal oxides are covalent, eg, Al2O3
***some metal oxides are amphoteric (both acidic and basic), eg, Al2O3

Examples of Metals and Non-metals

Property Metal Non-Metal
magnesium zinc oxygen sulfur
Density (g/mL) 1.74 7.14 0.0013 2.07
Melting Point (oC) 650 419 -219 113
Electrical Conductivity (megaohm-1) 23 16 0 10-21
Charge on Ion 2+ 2+ 2- 2-
Bonding in Oxides MgO
ionic		 ZnO
ionic		 O2
covalent		 SO2
covalent

Position of Metallic and Non-Metallic Elements in the Periodic Table

MetalsMetals occur on the left hand side of the Periodic Table.
Non-metalsNon-metals occur on the right hand side of the Periodic Table.
Semi-metals
(metalloids)		Semi-metals with properties in between metals and non-metals occur between these two groups. (B, Si, Ge, As, Sb, Te)
metals non-metals H
    He
Li Be   B C N O F Ne
Na Mg   Al Si P S Cl Ar
K Ca Transition Metals Ga Ge As Se Br Kr
Rb Sr Transition Metals In Sn Sb Te I Xe
Cs Ba Transition Metals Tl Pb Bi Po At Rn
Fr Ra Transition Metals  

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Metals
Metals have many properties like they are lusterous and are hard. They are also very good conductors of heat and electricity. They are most of the time magnetic also. But this is not for every metal for example, Lithium is soft. 
Examples of metals: 
Cobalt, iron, copper, plutonium
Non-metals

Non metals also have many properties as well. Their properties are pretty much the opposite of metals. They are poor conductors. 
Examples of non-metals: 
Oxygen, hydrogen, neon

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