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An Essay on theComparison and Contrast between Group 1 and Group 2 Elements

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Introduction

An Essay on the Comparison and Contrast between Group 1 and Group 2 Elements In this essay I will examine the characteristics of group 1 and group 2 elements which are also known as alkaline metals. Group 2 metals are alkaline earth metals which are strong reducing agents, and as a result, give up their electrons easily. They are less reactive than the alkali metals, but still reactive enough that they are not found naturally occurring in nature. The metals are a shiny, silver-white colour and can conduct electricity well. The elements include beryllium, magnesium, calcium, strontium, barium, and radium. All of the Alkaline Earth Metals are found in the Earth's crust. They are usually distributed in rock structures as they are too reactive to exist in the natural form. Magnesium is the eighth most abundant element on earth and can be found in carnellite, magnesite, and dolomite. Calcium is the fifth most abundant element on earth and can be found in chalk, limestone. Group 1 are known as alkali metals these metals have only one electron in their outer shell and readily lose the one electron in ionic bonding with other elements they include the following elements lithium, potassium, sodium, francium and caesium. ...read more.

Middle

When strontium nitrate was heated it made popping sounds and became a liquid which started to become yellow into green and then brown, some light fumes were given off and there was gas at the top of the test-tube. Group 1 and 2 nitrates are all soluble, all the nitrates are soluble this is the chemical formula Sr(No3)2 ? BaO+No3. Lead nitrate is used in this test as a reference because this is the normal behaviour of a metal nitrate on heating. Lead nitrate was popping going into yellow fumes which went orange to brown and nitrogen oxide was given off this is shown by this equation: Pb(No3)4 ? PbO+4No2+3/2O2. Lithium nitrate is one if the peculiar nitrates this behaves like magnesium nitrate and like the elements in its group. This is one piece of evidence for the diagonal relation ship between lithium and magnesium nitrate. Diagonal relationship is the tendency of the element in the first row to behave like the element in the second row. Now I will talk about my third experiment which was about the reaction of metallic elements with water. The experiment was carried out using potassium and sodium. ...read more.

Conclusion

Here is the formula equation for barium hydroxide Ba(OH)2(s)+Aq Ba2+(aq)+2OH-(aq) also indigestion tablets contain Mg(OH) to neutralise excess acid in the stomach. When carbonate was added to the common salts of group 1 it still remained a colourless solution because all group 1 carbonates as I've stated are soluble and the formula equation is stated in this essay. When group 2 salts were added to carbonate we saw that all the group 2 salts were a white precipitate form and all group 2 salts are insoluble. On my fifth experiment I did a flame test using nichrome wire and the solid of group 1 and 2 compounds. The solids included sodium, potassium, calcium, strontium and barium. The colour of sodium is orange the colour of potassium is lilac the colour of calcium is brick red the colour of strontium is crimson red and the colour of barium is green. The characteristic flame colours arise from transitions within the atom. Heat energy from the flame excites and electron to a higher energy level. The electron returns to a lower level and the excess energy is released as light energy. The frequency of the flame colour depends upon the difference between the energy levels involved. ...read more.

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