s block elements – with accurate answers (verified)Graded A

increasing order of densities of alkali metals - Answers-Li<K<Na<Rb<Cs the anomoly between K and Na is because moving from Na to K the mass increases by the volume also increases substantially because of the density of K is less than the density of Na metallic character trend - Answers-based on ionization energy; increases down a group; decreases across a period Stability of alkyl halide - Answers-increases on going down the group Diagonal Relationships in the periodic table - Answers-between Li and Mg and between Be and Al because of the similarity between their charge densities. Amphoteric - Answers-a substance that can act as both an acid and a base BeO, Zn(OH)2, Be(OH)2 Solvay Process - Answers-an industrial method for obtaining sodium carbonate from sodium chloride and limestone Na2CO3 can be prepared but K2CO3 cannot be prepared beacuse KHCO3 is more soluble than NaHCO3. solubility trend - Answers-as you go down a group, solubility decreases except for Li(least soluble) beause the degree of hydragtion is grestest for small atoms. since Li is the smallest atom it ha sthe highest degree of hydration. Ionic mobility - Answers-degree of hydration is inversely proportional to ionic mobility and the degree of hydration is highest for small atoms. brine solution - Answers-is the aqueous solution of NaCl it is used for the preparation of sodium Cardonate(Na2CO3) and it is also used for the production of Permutit(used for removal of permanant hardness by removing the Mg and Ca ions by Na ions of permutit) divalent magnesium ion - Answers-has high hydration energy and high hydration energy as well. Lime water - Answers-Ca(OH)2 Plaster of Paris - Answers-calcium sulfate; a white powdery substance which forms a quick-setting paste when mixed with water.