| 1 |
This bluish-whit metal is extremely hard and brittle, and is used almost entirely to make the very hard alloys used in fountain pen nibs, phonograph needles, and instrument pivots.
|
Cadmium<br>
Rubidium<br>
Hafnium<br>
Osmium<br>
|
| 2 |
Which mental has a melting point of 1084, It is widely used as an agricultural poison, and as an agricultural in the purification of water in its pure form its is reddish-brown in colour
|
Arsenic <br>
Lead<br>
Copper<br>
Tin<br>
|
| 3 |
The metal is mostly used in plating, to produce a hard easily polished surface Combined with lead, it produces a yellow pigment.
|
Tungsten<br>
Bronze <br>
Chromium<br>
Copper<br>
|
| 4 |
The name ''copper'' is derived form the name of the tiny island country of
|
Cyprus <br>
Denmark<br>
Greece<br>
Malta<br>
|
| 5 |
Which metal is extensively used with other metals to produce alloys, particularly in die-casting, its is used to ''galvanize'' metals to prevent corrosion?
|
Copper<br>
Chromium<br>
Lead<br>
Zinc<br>
|
| 6 |
Which metal is the fifth most abundant element in the earth's crust and is an essential constituent of leaves, shells, bone and teeth
|
Iodine<br>
Calcium<br>
Phosphorous <br>
Zinc <br>
|
| 7 |
Which metal is silvery-with in colour, and is easily polished to a high shine, It is hard malleable and ductile , and is a reasonable conductor of both heat and electricity, It is used extensively in the production of stainless steel and other corrosion resistant alloys,
|
iron <br>
brass
nickel<br>
silver<br>
|
| 8 |
Which meta, steel-gray in colour is one if the lightest of all metals, Both the metal and its salts are highly toxic, and must be handled copper , it is extensively used in spring and electrical contacts.
|
Gold <br>
Nickel<br>
Silver<br>
Beryllium<br>
|
| 9 |
which metal is solve - with in colour developing a slighly yellow/pink a colour upon exposure to air. It is widely distributed on earth and occurs in over 800 known mineral. its oxide is used in the production of high intensity lights.
|
Silver<br>
yttrium<br>
Scandium<br>
Aluminum<br>
|
| 10 |
Which metal's earlier name was ''wolfram'' which explains its symbol, ''W" it melts at about 3410 degrees Celsius , which is the highest melting point of all metals , it is commonly used as the filament of light bulbs.
|
Cobalt<br>
Radium<br>
Tungsten<br>
Uranium<br>
|
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