21. In . . . . . . . . Newlands arranged the known elements according to the increasing order of atomic masses and found that the properties of each eighth element are similar to the properties of the first element.
22. Which of the following does not increase in going from top to the bottom in a group
23. In the modern periodic table, what are the basic elements of group 18 (all other than having eight electrons in their outermost shell)?
24. Which one of the following triads represents the Dobereiner triad?
25. A factor affecting the ionization potential of an element is . . . . . . . .
26. Consider the following statements with reference to the Periodic Table of chemical element
1. Ionisation potential gradually decreases along a period.
2. In a group of element, electron affinity decreases as the atomic weight increases.
3. In a given period, electronegativity decrease as the atomic number increases.
Which of these statement(s) is/are correct?
1. Ionisation potential gradually decreases along a period.
2. In a group of element, electron affinity decreases as the atomic weight increases.
3. In a given period, electronegativity decrease as the atomic number increases.
Which of these statement(s) is/are correct?
27. . . . . . . . . shows that the atomic number of an element is more fundamental than its atomic mass?
28. Name the Russian chemist who proposed that the properties of elements are a periodic function of their atomic masses?
29. Select the option to be obtained by placing the following elements in descending order based on their metallic characteristics.
Na, Si, Cl, Mg, Al
Na, Si, Cl, Mg, Al
30. Newlands' octave rule applies only to . . . . . . . . element.
Read More Section(Periodic Classification of elements)
Each Section contains maximum 100 MCQs question on Periodic Classification of elements. To get more questions visit other sections.