#Reactivity trend series#
the increase in electron affinity down the group. The reactivity series In a reactivity series, the most reactive element is placed at the top and the least reactive element at the bottom. A tincture of iodine is used to treat wounds. Lets go through each statement in detail and reason out if it can explain this reactivity trend. Iodine is a solid, but when heated, it turns into a violet-colored noxious gas. It’s also used in sedatives and insecticides. Bromine has a terrible odor but is used in fire extinguishers. It shares this characteristic with mercury. However, when diluted, it’s an excellent bleach, bactericide and disinfectant.īromine is a rare element that is a liquid at STP. One of them is Teflon, which is nearly as non-reactive as fluorine is reactive.Ĭhlorine is also a toxic gas at STP and was famously used as a weapon during World War I. However, its compounds are often remarkably stable. a redox reaction in which the same element is both oxidised and reduced. It is so reactive that it even attacks glass, causes water to burst into flame and even forms compounds with noble gases. trend in reactivity going down group 7 - decreases - increased atomic radius - increased shielding - become weaker oxidising agents going down the group. For reactivity with O 2, burn Mg ribbon using tongs in a Bunsen. Once reaction is complete the balloon can be ignited to test for the composition of the gas produced. Add dilute acetic acid to the flask and stopper.
#Reactivity trend free#
Because of this, they are almost never found in a free state.Īt standard temperature and pressure, fluorine is a greenish gas. For reactivity with dilute acid, add Mg and Ca to separate 250 mL filter flasks with balloons attached to the side arm. 51.Halogens are reactive because their outer shells are unfilled and they seek electrons from other elements. 643.Ību-Gharib, E.A., El-Khatib, R.M., Nassr, L.A.E., and Abu-Dief, A.M., J. Periodic trends are specific patterns in chemical element properties revealed by the periodic table of elements. 1975.īlandamer, M.J., Burgess, J., Clark, B., Duce, P.P., Haken, A.W., Gosal, N., Guradado, P., Sanches, F., Hubard, C.D., and Abu-Gharib, E.A., J. 163.īertram, A., Lovet, E., and Roberts, E., J. Wang, C.J., Hsieh, Y.J., Chu, C.Y., Lin, Y.L., and Tseng, T.H., Cancer Lett., 2002, vol. Period - reactivity decreases as you go from left to right across a period.The farther to the left and down the periodic chart you go, the easier it is for electrons to be given or taken away, resulting in higher reactivity. Madari, H., Panda, D., Wilson, L., and Jacobs, R., Cancer Res., 2003, vol. Elements react by losing 2 electrons to form +2 ions, which requires the input of two ionisation energies, which decrease down the group as attraction between the nucleus and outer electrons decreases, so elements become more reactive and stronger reducing agents down the group. 703.įinn, G.J., Creaven, B., and Egan, D.A., Melanoma Res., 2001, vol. Getting involved: The atom-efficient and environmentally benign catalytic hydrogenation of carboxylic acid esters to alcohols has been accomplished in recent years mainly with precious-metal-based ca. Trend in reactivity and ionisation energy down group 2. Kirkiacharian, S., Thuy, D.T., Sicsic, S., Bakhchinian, R., Kurkjian, R., and Tonnaire, T., Farmaco, 2002, vol. Heterocyclic Chemistry, Hapworth, J.D., Boulton, J.A., and Mikillap, A., Eds., Oxford: Pergamon, 1984, vol. Smyth, T., Ramachandran, V.N., and Smyth, W.F., Int. Honmantgad, S.S., Kulkarni, M.V., and Patil, V.D., Indian J. Stahman, M.A., Huebner, C.F., and Link, K.P., J. Sangwan, N.K., Verma, B.S., Malik, O.P., and Dhindsa, K.S., Indian J. Reddy, N.S., Mallireddigari, M.R., Cosenza, S., Gumireddy, K., Bell, S.C., and Reddy, E.P., Bioorg. Lin, R., Chiu, G., Yu, Y., Li, S., Lu, Y., Adams, M., Fuentes-Pesquera, A.R., Emanuel, S.L., and Greenberger, L.M., Bioorg. Melagraki, G., Afantitis, A., Markopoulou, O.I., Detsi, A., Koufaki, M., Kontogiorgis, C., and Hadjipavlou-Litina, D., Eur. Kaneko, T., Baba, N., and Matsuo, M., Chem. Rosskoph, F., Kraus, J., and Franz, G., Pharmazie, 1992, vol. Essentially reactivity decreases as you go from left to right. Describe the trend in reactivity in a vertical column of the periodic table. Arrange the four tested metals (Li, Na, Mg, Ca) in order of decreasing reactivity: Most reactive Least reactive > 2. Accuracy The accuracy with which trends in reactivity can be established and reactivity events pin - pointed can be determined by inspection of the data. Bhattacharya, S., Banerji, J., and Ghosh, P.C., Indian J. Transcribed image text: Reactivity Trends of Group IA and IIA Metals 1.