DE LA SALLE UNIVERSITY DASMARIÑAS
COLLEGE OF SCIENCE AND COMPUTER STUDIES
PHYSICAL SCIENCE DEPARTMENT
GENERAL CHEMISTRY I LABORATORY (CHEM210L)
MARIE JOE A. ALTERADO
JUNE 31, 2013
AUGUST 7, 2013
GROUP NO. 1
ENGR. IMELDA C. GALERA
The chemical periodicity was demonstrated by using different samples of Group IA, IIA and IVA elements. Each of the samples was placed in a test tubes and the physical state, color, and appearance was identified. The solubility of the element was tested through the use of water. The Group IIA Metal Oxides was tested through the use of the pink and blue litmus paper. Also a balanced equation was written to show the reaction between oxides and water.
Chemical periodicity is defined as the similarities of chemical elements that are close to each other in the periodic table. When elements are arranged in order of increasing atomic number, their physical and chemical properties recur periodically. For example, magnesium, calcium, and strontium are all hard, very reactive, silvery metals while neon, argon, and krypton are all unreactive colorless gases. This periodicity stems from the valence electronic configurations of the elements. This arrangement of elements in the order of increasing atomic number with the elements having similar properties placed in vertical columns is known as periodic table. MATERIALS/REAGENTS AND EXPERIMENTAL PROCEDURE
For the Group IA & IIA Elements, each small amount samples ofLi2CO3, Na2CO3, K2CO3, MgCO3, CaCO3 and BaCO3 was place in the different test tubes. After placing them in the test tubes, we identified the physical state, color, and appearance of each. Then we test the solubility of each sample by using water. For the Group IVA Element, each small amount samples of C, Sn, Si, and Pb was placed in different test tubes. Then its physical state,...
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