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Periodic Table Important Questions Question 1. State the number of elements in period 1, period 2 and period 3 of the periodic table. Question 2. Name the elements in period 1. Question 3. What happens to atomic size of elements on moving from left to right in a period? Question 4. State the common feature of the electronic configuration of elements at the end of period 2 and 3. Question 5. If an element is in Group 7 [or Group 7 A] is it likely to be metallic or non-metallic character. Question 6. Supply the missing word from those in brackets: If an element has one electron in its outermost energy level [shell] then it is likely to be ______________ [metallic/non-metallic]. Question 7. Complete the sentence choosing the correct word/s from those given in brackets. i. ii. iii. iv. The properties of the elements are a periodic function of their ____________ [atomic number, mass number, relative atomic mass.] Moving across a ________ of the Periodic Table the elements show increasing ________ character [group, period, metallic, non-metallic] The element at the bottom of a group would be expected to show _____________ metallic character than the element at the top [less, more] The similarities in the properties of a group of elements is because they have the same _________ [electronic configuration, number of outer electrons , atomic numbers.] Question 8. What does a Group in the Periodic Table mean? Within a Group where would you expect to find the element having following properties? i. ii. The greatest metallic character, The largest atomic size. Question 9. State whether the ionisation potential increases or decreases on going down a Group. Question 10. How many elements are there in Period 2? Question 11. Name the gas that is the most electronegative among all the elements. Question 12.With reference to the first three periods of the modern periodic table answer the following questions: i. ii. iii. iv. v. vi. Write the formula of the sulphate of the element with atomic number 13. What type of bonding will be present in the oxide of the element with atomic number 1. Which feature of the atomic structure accounts for the similarities in the chemical properties of the elements in-group 7A of the periodic table? Name the element that has the highest Ionisation potential. How many electrons are present in the valence shell of the element with the atomic number 18. What is the electronic configuration of the element in the third period that gains one electron to change into an anion? ICSEChemistryTeachers 1
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