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ICSE CHAPTERWISE 2017 : Chemistry

46 pages, 614 questions, 37 questions with responses, 38 total responses,

Adhithyan Js
Good Shepherd Public School & Junior College, Thengana, Changanasserry
XI biomaths

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CHEMISTRY REVISION 1. Periodic Properties and Variation in Properties Q. 1. State the number of elements in Period 1, Period 2 and Period 3 of the Periodic Table. Q. 2. Name the elements in Period 1. Q. 3. What happens to atomic size of elements on moving from left to right in a period? Q. 4. What is the common feature of the electronic configuration of the elements at the end of Period 2 and Period 3? Q. 5. If an element is in group 7 (VII A), is it likely to be metallic or non- metallic in character? Q. 6. Supply the missing word from those in brackets: If an element has one electron in its outermost energy level, then it is likely to be ________ (metallic/non-metallic). Q. 7. Complete the following sentences using the correct word. (i) The properties of the elements are a periodic function of their ___________ (atomic number, mass number, relative atomic mass). (ii) Moving across a ___________ of the Periodic Table, the elements show increasing ___________ character (group, period, metallic, non-metallic). (iii) The elements at the bottom of a group would be expected to show __________ metallic character than the element at the top (less, more). (iv) The similarities in the properties of a group of elements are because they have the same __________ (atomic number, electronic configuration, number outer electrons). Q. 8. What is meant by a Group in the Periodic Table? Q. 9. Within a group where would you expect to find the element with: (a) the greatest metallic character? (b) the largest atomic size? Q.10. State whether the ionization potential increases or decreases on going down a Group. Q.11. How many elements are there in Period 2? Q. 14. Parts (i) to (v) refer to changes in the properties of elements on moving left to right across a period of the Periodic Table. For each property, choose the letter corresponding to the correct answer from the choices a, b, c and d. (i) The non-metallic character of the elements: (a) decreases (b) increases (c) remains the same (d) depends on the period. (ii) The electro-negativity: (a) depends on the number of valence electrons (b) decreases (c) remains the same (d) increases. (iii) The ionization potential: (a) goes up and down (b) decreases (c) increases (d) remains the same. (iv) The atomic size: (a) decreases (b) increases (c) remains the same (d) sometimes increases and

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