Metals

Question 1

blended mixture of materials of which at least one is a metal e.g. steel alloy, copper alloy (e.g. brass)

Answer 1

alloy

Question 2

Al
(Brit) or aluminum (US) ligth weight metal made out of bauxite.
It is very good electrical conductor and has excellent alloying properties. The protective layer resulting of oxidation is very resistant to heat.

Answer 2

aluminium

Question 3

1) Iron-carbon alloy with a carbon content greater than 2%.
2) Different types of cast iron:
- grey cast iron which has less tensile strength and shock resistance than steel, but its compressive strength is comparable to low- and medium-carbon steel.
-white cast iron
-malleable cast iron
-ducile cast iron
3)’With its relatively low melting point, good fluidity, castability, excellent machinability, resistance to defor- mation and wear resistance, cast irons have become an engineering material with a wide range of ap- plications and are used in pipes, machines and automotive industry parts, such as cylinder heads (declining usage), cylinder blocks and gearbox cases (declining usage). It is resistant to destruction and weakening by oxidation (rust).’
Source: Wikipedia 2016

Answer 3

cast iron

Question 4

Cr

transition-metal, which is often used to plate steel because it adds anti-corrosive properties

Answer 4

chromium

Question 5

Cu
heavy metal which is soft, reddish when not oxidated. It has excellent electrical conductivity and alloying properties (e.g.bronze, brass, constantan, German silver etc…)
Copper oxidates fairly quickly but its oxidation process stops as soon as the oxidation layer (called ‘patina’ or ‘vert-di-gris’) is sufficient to protect the metal against further chemical attack.

Answer 5

copper

Question 6

metals which contain iron (Fe) e.g. steel and steel alloys. Ferrous metals oxidate and their oxidation is called ‘rust’

Answer 6

ferrous metals

Question 7

metal which are very dense

e.g. Cadmium (Cd), Lead (Pb), Mercury (Hg), Copper (Cu)

Answer 7

heavy metals

Question 8

The amount of carbon in steel can vary. The steel with the highest amount carbon possible (0.7% - 1.5%) is called high carbon steel.

Answer 8

high carbon steel

Question 9

iron ore is the naturally occurring mineral from which iron is extracted from

Answer 9

iron ore

Question 10

(Pb)

Heavy metal which doesn’t oxidate

Answer 10

lead

Question 11

metals with a very low density

e.g. Aluminium, Magnesium, Maganese, Lithium, Titanium

Answer 11

lightweight metals

Question 12

Hg

Heavy metal which is one of the very few metals liquid at ambient temperature

Answer 12

mercury

Question 13

metal foam is a material with a cellular structure consisting of a solid metal with gas-filled pores.

Answer 13

metal foam

Question 14

materials which are not considered as metals but show some of the properties of metals e.g. Germanium (Ge), Silicon (Si)

Answer 14

metalloides

Question 15

In chemistry, a nonmetal (or non-metal) is a chemical element that mostly lacks metallic attributes. Physically, nonmetals tend to be highly volatile (easily vaporised), have low elasticity, and are good insulators of heat and electricity.
e.g. Hydrogen (H), Carbon (C), Oxygen(O), Sulphur/sulfur (S) and noble gases (Helium (He), Neon (Ne), Argon (Ar), Kr (Krypton), Xenon (Xe)
Source: Wikipedia 2015

Answer 15

Non-metals

Question 16

also known as crude iron, is an intermediate product of the iron industry in the production of steel which is obtained by smelting iron ore in a blast furnace.
(source: wikipedia ‘pig iron’ https://bit.ly/3AE5rKt)

Answer 16

pig iron

Question 17

metals which are considered to be rare and possess valuable properties (chemical stability, excellent electrical conductivity etc…)
ex.: Gold (Au), Silver (Ag), Platinum (Pt), Paladium (Pd)

Answer 17

precious metals

Question 18

ferrous metal with excellent alloying properties

Answer 18

steel

Question 19

a common process of heat-treating to increase the toughness of steel and iron-based alloys

Answer 19

tempering

Question 20

(Sn) heavy metal useful as alloying element (e.g. brass)

Answer 20

tin

Question 21

W (also called wolfram)
A hard, rare metal under standard conditions when uncombined, tungsten is found naturally on Earth only in chemical compounds. It was identified as a new element in 1781, and first isolated as a metal in 1783. Tungsten’s many alloys have numerous applications, most notably in incandescent light bulb filaments, X- ray tubes (as both the filament and target), electrodes in TIG welding, superalloys, and radiation shielding. About half is used in the form of tungsten carbide, a durable carbon alloy. Tungsten’s hardness and high density give it military applications in penetrating projectiles. Tungsten compounds are also often used as industrial catalysts.
Source: Wikipedia-2015

Answer 21

tungsten