​The grid given below represents part of the periodic table. Study it and answer the questions that follow. The letters do not represent the actual symbol of the element
(i) Select a letter which represents an element that looses electrons most readily. Give a reason for your answer.
(ii) Explain why the atomic radius of P is found to be smaller than that of N (iii) Element M reacts with water at room temperature to produce 0.2 dm3 of gas. Determine the mass of M which was reacted with water. (molar gas volume at room temperature is 24 dm3 , relative atomic mass of M=7 (b) Use the information in the table below to answer the question that follows. (The letters are not the symbols of the elements)
Identify a letter which represents an element in the table that could be calcium, carbon or sculpture. Give reasons in each case.
(i) Calcium: Reason (ii) Carbon Reason (iii)Sulphur: Reason
ANSWERS
​(a)(i)R - it has the largest atomic radius with the weakest nuclear attraction for outermost electron
(ii)Across the period the atomic radius decreases due to the increase in nuclear attraction Number of electrons in P is greater than in H
​(b)(i) W - forms a basic oxide which forms an ionic bond
(ii)Y - the oxide is gaseous that forms a neutral solution (iii)U - the oxide is solid at room temperature, which is acidic with covalent bond ​Related Chemistry Questions and Answers on The Mole Form 3 Level
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