1. Which is not similar characteristic(s) about the electronic configuration of Be, Mg, Ca? (a) All the atoms have a pair of s-electrons in their outermost energy level (b) All the... 1. Which is not similar characteristic(s) about the electronic configuration of Be, Mg, Ca? (a) All the atoms have a pair of s-electrons in their outermost energy level (b) All the atoms contain a pair of p-electrons in their outermost energy level (c) All are alkaline earth metals (d) All are of second group of the periodic table 2. The elements with atomic number 117 and 120 are yet to be discovered. In which group would you place these elements when discovered? (a) 17, 2 (b) 16, 4 (c) 15, 3 (d) 18, 2 3. The most electropositive element possesses the electronic configuration: (a) [He] 2s1 (b) [Ne] 3s2 (c) [Xe] 6s1 (d) [Xe] 6s2 4. Which one of the following elements shows both positive and negative oxidation states? (a) Cesium (b) Fluorine (c) Iodine (d) Xenon 5. The number of elements present in fifth period is: (a) 18 (b) 32 (c) 8 (d) 24 6. Which of the following arrangements shows the correct order of decreasing paramagnetism? (a) N > Al > O > Ca (b) N > O > Al > Ca (c) O > N > Al > Ca (d) O > N > Ca > Al 7. The outer electronic structure of lawrencium (atomic number 103) is: (a) Rn 5f13 7s2 7p2 (b) Rn 5f13 6d1 7s2 (c) Rn 5f14 6d1 7s2 (d) Rn 5f14 6d4 7s2 8. The elements with the lowest atomic number that has a ground state electronic configuration of (n - 1)d6 ns2 is located in the: (a) fifth period (b) sixth period (c) fourth period (d) third period Read more