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chemistry > uses of chapter one > Flashcards

uses of chapter one Flashcards

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1
Q

all of main transion element from nearly ……. of the weight

of earth crust but they have high …………

A
  1. 7%
  2. economic importance
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2
Q

the properties of scandium

A

rarely exists in earth crust and spread on a large area of earth crust

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3
Q

uses of scandium and why

A

added to mercury vapor lamp to produse light with high quality looks like sun light so it used in tv , photography at night

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4
Q

scandium alloy and propertis and uses

A
  1. scandium with aluminum
  2. alloy is light and very hard alloy used in manufacture of mig fighter jets
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5
Q

titanium properties

A

it is very hard similar to steel but less density

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6
Q

uses of ti

A

uses in dental implantes and artificial joints

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7
Q

give reason ti uses in dental implantes and artificial joints

A

bec the body doesnt eject it and doesnt cause any type of poisoining

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8
Q

why ( titsnium _ aluminum )

used in manufacture of airplane and space shutle

A

because it maintains its durability at high temperature while srength of aluminum decreases

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9
Q

titanium alloys

A
  1. titanium with aluminum
  2. alloy used in manufacture of airplane and space shutle
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10
Q

titanium compounds

A

titanium dioxide tio2

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11
Q

tio2 use in ………..

A

sun protction cosmetics

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12
Q

why tio2 use in sun protction cosmetics

A

bec minute nanoparticles of it protect skin from the effect of ultraviloet rays

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13
Q

properties of v

A

silver grey element , very hard and resists corrosion

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14
Q

vandium alloys

A

added to steel by small proprtion forming a high hardness and has great ability to resist corrosion

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15
Q

uses of vandium alloys

A

in manfcture of car spring

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16
Q

vandium compounds

A

vanadium pentaoxide V2O5

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17
Q

vandium compounds uses

A

use as a catalyst

  1. -in manfuacture of strong magnetic conductors
  2. manfucture of dyes used in ceramic
  3. manfucture of glass industry
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18
Q

properties chromium

A

high chemically active element but resists the effect of atmospheric air

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19
Q

chrmomium is chemically active metal , but resists rust and corrosion factors GR

A

duto the formation of non porous oxide layer on its surface which prevents oxidation

20
Q

uses of cr

A

plating of metals to protect it from rust and leather tanning دباغة الجلود

21
Q

chromium compounds is and they uses

A
  1. chromium trioxide (Cr2 O3) used in manfacture of dyes الاصباغ
  2. potassium dichromate (K2 Cr2 O7) IS an oxidizing agent
22
Q

properties of manganese

A

it is not used as a pure metal but used in alloys or compounds

23
Q

why manganese not used as a pure metal but used in alloys or compounds

A

bec it is brittle metal معدن هش

24
Q

manganese alloys and used

A
  1. Ferromanganes allo (manganese and iron) alloy used in manufacture of railway tracks قضبان القطر
  2. manganese and aluminum alloy used in manufacrure of soft drinks cans
25
Q

give reason Ferro manganese manganese and iron alloy used in manufacture of railway tracks

A

bec it is harder than steel

26
Q

give reason manganese and aluminum alloy used in manufacrure of soft drinks cans

A

bec it resists corrosion يقاوم التاكل

27
Q

manganese compounds and used

A
  1. manganese dioxide ( Mn O2 ) acts as a strong oxidizing agent in dry cell potassium permanganate
  2. ( KMnO4 ) used as antiseptic مطهر manganese sulphate
  3. ( Mn SO4 ) used as a fungicide مبيد الفطريات
28
Q

properties of iron

A

it is the most abundant transtion element in the earth s crust

29
Q

uses of iron

A
  1. reinforced concrete خرسانة مسلحة -
  2. electricity pylons أبراج الكهرباء -
  3. knife
  4. gun and canon pipes مدفع الحروب القديمة -
  5. used in catalyst in manufacture of ammonia gas by haber - bosh method N2 + 3H2 →Fe /500-200atm→2NH 6
  6. used as a catalyst in liquefaction of water gas (H2 - CO) to use as fuel by (fischer - tropsh ) method
30
Q

properties of cobalt

A
  1. it is similar to iron in which both of them can be magnetized so they are used in manfucture of magnet
  2. has 12 radioactive isotopes
31
Q

what is uses of cobalt

A

chromium used in manufacure of modern dry baeries that is used in cars

32
Q

cobalt 60 produces …………………….

and uses

A

produces gamma rays which has a high penetration power

so it used in

  1. preservation of food
  2. detection the quality of industrial products as it detects the sites for cracks and welding connections
  3. in medicine used to diagnoses and treatment of tumors
33
Q

nickel uses

A
  1. it is used in manufacture of nickel cadmium battery that can be recharged
  2. it used in plating of metals to protect it from corrosion and rust
  3. divided nickel is used as a catalyst in hydrogenation of oils
34
Q

nickel alloys and uses an properties

A
  1. nickel with steel alloy is very hard and resists corrosion , rust and acids
  2. nickel with chromium alloy used in heating coils and electric furnaces
35
Q

nickel with chromium alloy used in heating coils and electric furnaces

A

because it resist corrosion and melting when it is heated to the degree of redness

36
Q

properties of copper

A

copper is the first dicovered metal

37
Q

uses of copper

A

it used in manufacture of electric wires and coins

38
Q

give reason copper used in manufacture of electric wires

A

because it is good conductor of electricty

39
Q

copper alloys

A

manfufacture of alloys like bronze alloy

40
Q

bronze alloy consists of

A

copper and tin

41
Q

copper compounds and uses

A
  1. copper sulphate ( CuSO4 ) used as insecticides and fungicide in purification of water
  2. Fehling reagent used to detect glucose as it turns from blue to orange in glucose solution
42
Q

uses of zinc

A

it is used in galvanization of metals to protect them from rust and corrosion

43
Q

zinc compounds and uses

A
  1. zinc oxide ( ZnO ) used in manufacture of paints , rubber and cosmeticsمستحضرات تجميل
  2. zinc sulphide ( ZnS ) used in manufacture of illuminating paintsالدهانات المضيئة and x - ray
44
Q

give reason titanium with aluminum alloy used in manufacture of aircrafts and space shuttle

A

because it maintains its durability at high temperature while strength of aluminum decreases

45
Q

vanadium added to steel in a small proportion why

A

to forming a high hardnees and has a great abilty to resist corrosion

chemistry (10 decks)

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