Solubility of hydroxides decrease as we move down the group. Solubility of hydroxides increases as we move down the group. MgCl 2 Mg SO 4 > Ca SO 4 > Sr SO 4 > Ba SO 4 Group IIA (Alkaline earth metals) and groups IIB (Zn, Cd, Hg) Mg acts as a bridge element between IIA and IIB.īeO is amphoteric, other oxides are basic.Įlectron – deficient BeX2, others (MX2) are ionic: Isolated as chloride in 1898 from the mineral pitchblende
#REACTIVITY TREND OF ALKALI EARTH METALS TV#
SrCO 3 is used for the manufacture of glass for colour TV picture tubes.įound in minerals witherite (BaCO 3) and barite (BaSO 4) after which it is named.īaSO 4 is used in medicine as a contrast medium for stomach and intestine Calcium is the primary constituent of teeth and bones.ĭiscovered in 1787 and named after the small town of strontion (Scotland) When alloyed with Al, Mg is widely used as structural materials because of its high strength, low density and ease in machining.Ĥ.15%, 5thmost abundant element in earth’s crust.ĬaCO 3.2H 2O obtained in pure form in 1808, calcium is derived from latin word calx, meaning “lime”Īs an alloying agent for hardness in aluminium compounds. Pure Mg first prepared in 1800, named after the magnesia district in Thessaly Greece where large deposits of the mineral are found Like alkali metals, alkaline earth metals are also highly reactive and hence do not occur in the free state but are likely distributed in nature in the combined state as silicates, carbonates, sulphates and phosphates.įirst detected in 1798 in the gemstone beryl and emerald ( Be 3 Al 2 Si 6 O 1)ħth most abundant element in earth’s crust
#REACTIVITY TREND OF ALKALI EARTH METALS PLUS#
So, group 2 metals are called alkali earth metals because their hydroxides are strong alkali (just like those of alkali metals) plus these all are found in earth crust. The name alkaline earth metals was given to magnesium, calcium, barium & strontium since their oxides were alkaline in nature and these oxide remained unaffected by heat or fire and existed in earth. They are Beryllium (Be), Magnesium (Mg), Calcium (Ca), Strontium (Sr), Barium (Ba) and Radium (Ra). The group 2 of the periodic table consists of six metallic elements. Reaction With Water (Formation of Hydroxides) Reaction With Carbon – (Formation of Carbides) Reaction With Hydrogen – (Formation of Hydrides)
Concepts of Physics by HC Verma for JEEĭifference between Alkaline Earth Metals and Alkali MetalsĬhemical Properties of Alkali Earth Metals.IIT JEE Coaching For Foundation Classes.
0 kommentar(er)
