OBJECTIVE LIFE SCIENCE
BIOCHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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air
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water
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sugar
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iron
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Detailed explanation-1: -iron (Fe), chemical element, metal of Group 8 (VIIIb) of the periodic table, the most-used and cheapest metal.
Detailed explanation-2: -In the modern world, iron alloys, such as steel, stainless steel, cast iron and special steels, are by far the most common industrial metals, due to their mechanical properties and low cost.
Detailed explanation-3: -Iron is a chemical element with symbol Fe and atomic number 26. Classified as a transition metal, Iron is a solid at room temperature.
Detailed explanation-4: -Iron is described as an element because it is a pure substance. A pure substance is where the atoms are similar and cannot be divided into smaller pieces without losing its composition. Iron is a metal and has 26 protons in its nucleus.
Detailed explanation-5: -(i) Magnetite (ii) Haematite (iii) Limonite (iv) Siderite.