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Riyesh Rahate
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MAHESH TUTORIALS I.C.S.E. ICSE X SUBJECT : CHEMISTRY Last Minute Revision Chapter : Periodic Table Q.1. Answer the following : (i) Group No. 1 - IA 2 - IIA 13 - IIIA 14 - IVA 15 - VA 2nd period Li D 3rd period A Mg E 4th period R T I Si Q 16 - VIA 17 - VIIA 18 - 0 O J H M u Ne y In the above table H does not represent hydrogen. Some elements are in their own symbol and position in the periodic table while others are shown with a letter. Identify 1. The most electronegative element. 2. The most reactive element of group I. 3. The element from period 3 with least atomic size. 4. The noble gas of the fourth period. 5. How many valence electrons are present in Q. 6. Which element from group 2 would have the least ionization energy. 7. In the compound between A and H what type of bond is formed and give its molecular formula. (ii) Name or state the following with reference to the elements of the modern periodic table. 1. The more non-metallic element from the elements S, P, CI and Ar. 2. A light element in period-3 with a neutron/proton ratio around 1. 3. The element with the highest ionisation potential from the elements of period 1, 2 and 3. (iii) Arrange the following elements as per the guidelines in brackets. 1. Na, Cl, Mg, P [in decreasing order of atomic size] 2. C, Li, F, N [in increasing order of electronegativity] 3. CI, Al, Na, S [in increasing order of ionisation potential] 4. Li, F, C, O [in increasing order of electron affinity] 5. Ar, He, Ne [in increasing order of number of electron shells]

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