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| 1. |
D block .S block .P blockF blockPhysical properties and chemical properties and it\'s applications |
| Answer» (a) s-block elements:All of the s-block elements are unified by the fact that their valence electrons (outermost electrons) are in an s orbital. The s orbital is spherical and can be occupied by a maximum of two electrons. All of the s-block elements are metals. In general, they are shiny, silvery, good conductors of heat and electricity and lose their valence electrons easily. In fact, they lose their trademark s orbital valence electrons so easily that the s-block elements are the most reactive elements.(b) p- block elements:Following are the properties of p-block elements.\tThey are solids/liquids/gases at room temperature (Br\xa0is liquid)\xa0\tThey have variable oxidation states\xa0\tThey form acidic oxides\xa0\tGenerally, they form covalent compounds\xa0\tHalogens form salts with alkali metals\xa0\tThey have high ionization potentials\xa0\tThey have very large electron gain enthalpies\xa0\tThe aqueous solutions their oxides are acidic in nature.(c) d-block elements:\tForm stable complexes\tHave high melting and boiling points\tContain large charge/radius ratio\tForm compounds which are often paramagnetic\tAre hard and possess high densities\tForm compounds with profound catalytic activity\tShow variable oxidation states\tForm coloured ions and compounds.(d) f-block elements:\tThey are usually heavy metals\tThese elements have a generally higher melting and boiling point\tThey display a variety of oxidisation states\tThese elements tend to form coloured ions\tThey form complex compounds | |