Chemical Properties of Metals Video Lecture - Class 10

physical and chemical properties of
metal
you
in this lesson we shall learn about
properties of metals
metals have shiny and lustrous
appearance also they are sonorous
all metals except mercury and gallium
are sold at room temperature metals can
be light as well as heavy
usually they are hard but sodium and
potassium are comparatively soft
many metals possess the characteristic
of male ability and ductility
metals like copper gold silver etc are
good conductors of heat and electricity
however lead and Mercury are poor
conductors of heat
metals usually have high melting and
boiling points
metal loses electron and changes to
positive iron and are called electro
positive elements
metals have different chemical
properties because of electrons in the
outermost orbit of the metal
metal's give electrons to oxygen atom
and react to bomb oxides the reaction of
different metals with oxygen varies
widely
metals like sodium and potassium burn if
kept open in air so they are kept in
kerosene
at normal temperature a thin layer of
oxide is observed on metals like
magnesium aluminium and zinc magnesium
then heated in air burns with dazzling
light and forms magnesium oxide
I earn and the remaining metals below I
earn in the Activity series react with
oxygen when heated in a
at high-temperature metals like gold
silver etc do not react with oxygen
oxides of metal like zinc oxide and
aluminum oxide possess both acidic and
basic properties such metals are called
amphoteric oxides
most metal oxides are insoluble in water
but some dissolve in water and form
alkali
metals react with water and form
hydroxide or oxides and die hydrogen gas
but all metals do not react with water
metals like sodium potassium calcium and
lithium react with cold water the dye
hydrogen gas produced by the reaction
explodes and burns fast
Magnusson does not react with cold water
however it forms magnesium hydroxide and
dye hydrogen gas and reacted with hot
water
similarly aluminium zinc and iron react
with steam to form the respective oxides
and dye hydrogen gas
metals like lead copper gold and silver
do not react with cold water or steam
all metals do not react with dilute
acids if metal reacts with dilute acid
then the corresponding salt and the
hydrogen gas are produced
metals react with dilute hydrochloric
acid to produce hydrogen with the
formation of their respective metallic
chlorides magnesium reacts readily
compared to zinc and copper
all metals except iron produce hydrogen
with very dilute nitric acid along with
metallic nitrates metals produce
metallic nitrates and nitrogen dioxide
with concentrated nitric acid
metals react with dilute sulfuric acid
to produce hydrogen and the respective
metallic sulfates
metals react with dichlorine to form the
respective clora
metals have a tendency to lose electrons
so they react with those elements which
can accept electrons
as dihydrogen does not accept electrons
active metals like sodium potassium and
calcium combined with hydrogen and form
hybrids of that metal
you