Modern Periodic Law Quizz 1. Lothar Meyer arranged the elements in order of increasing: Atomic weight Density Atomic volume Atomic radiiQuestion 1 of 202. Law of Octaves was proposed by: JW Dobereiner D.I Mendeleev John Alexander Newlands Lothar MeyerQuestion 2 of 203. Law of Triads is applicable to which set of elements? Sodium, Potassium, Rubidium Fluorine, Iodine, Bromine Chlorine, Bromine, Iodine Lithium, Beryllium, BoronQuestion 3 of 204. In Mendeleev’s periodic table, the groups were divided into how many subgroups? 4 1 2 3Question 4 of 205. Modern periodic table is divided into: 18 periods and 7 groups 8 periods and 18 groups 18 periods and 8 groups 7 periods and 18 groupsQuestion 5 of 206. Moseley performed experiments and studied the frequencies of which radiations emitted from the elements? Gamma rays X-rays UV rays Infra red raysQuestion 6 of 207. Among the following statements the one that is not true about Mendeleev’s Periodic Table is: Elements of group 7 and 8 were arranged on the basis of equivalent weights Some elements in the same group differ in their properties Elements were arranged on the basis of atomic weights The position of hydrogen was not justifiedQuestion 7 of 208. Which scientist proposed that atomic number is more fundamental property of an element than its atomic mass? Newlands Lothar Meyer Moseley MeyerQuestion 8 of 209. Johann Dobereiner classified elements in group of three elements called as Trinity Trials Triads DiadsQuestion 9 of 2010. In the modern periodic table, which period contains 32 elements? Sixth First Seventh SecondQuestion 10 of 2011. Horizontal rows in the periodic table are called: Cell Table Groups PeriodsQuestion 11 of 2012. The second and third period of the modern periodic table contains how many elements? 8 32 18 2Question 12 of 2013. Newland arranged elements in increasing order of atomic weights and noted that every eighth element had properties similar to: Third element Fourth element Second element First elementQuestion 13 of 2014. According to Dobereiner’s law of triads the number of elements present in each group is: 2 4 5 3Question 14 of 2015. Lothar Meyer proposed that on arranging the elements in order of increasing atomic weights; similarities appear in which type of properties? Only physical properties Only chemical properties In both physical and chemical properties thermodynamic propertiesQuestion 15 of 2016. Eka silicon predicted by Mendeleev is which element: Germanium Aluminium Gallium SodiumQuestion 16 of 2017. Eka aluminium predicted by Mendeleev is which element? Germanium Magnesium Gallium SodiumQuestion 17 of 2018. The basis of long form of periodic table is: Mass number Atomic weight Atomic number Ionic radiusQuestion 18 of 2019. Mendeleev predicted the existence of which element/elements in the periodic table? Gallium Sodium and germanium Gallium and germanium Germanium and GoldQuestion 19 of 2020. At present how many elements are known? 110 114 63 105Question 20 of 20 Loading…