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Miracle Learning Centre Chemistry Tuition Question on Periodic Table . (O Level Chemistry Tuition/ IP Chemistry Tuition)

1. Use the information in the table to answer the questions below. (You may use a letter once, more than once or not at all.)

(a) Which element could be hydrogen ? Give a reason for your choice. …………………………………………………………………………………………. …………………………………………………………………………………………. …………………………………………………………………………………………. (b) Which two elements are in the same Group of the Periodic Table ? Give a reason for your choice. …………………………………………………………………………………………. …………………………………………………………………………………………. (c) Using columns 3 and 4, calculate the mass of 1 mole of M and identify M ……………………………………………………………………………..……………. …………………………………………………………………………………………. …………………………………………………………………………………… (d) Give two observations you might make when element R is added to a dilute hydrochloric acid. ……………………………………………………………………………..……………. …………………………………………………………………………………………. …………………………………………………………………………………… Miracle Learning Centre Answer to Chemistry Tuition Question on Periodic Table . (O Level Chemistry Tuition/ IP Chemistry Tuition) 1. a. A. 24 dm3 of A weighs 24 x 0.08 g i.e. approx = 2 g b. G and J They have the same valency, one, towards oxygen and form oxides of similar formula c. Mass of one mole of M = 3 x 15 = 45 g Scandium d. There is an effervescence forming a colourless and odourless gas A pale green solution formed. Element R becomes smaller in size

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