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प्रश्न
Arrange the following as per instruction given in the bracket.
Cs, Na, Li, K, Rb (increasing metallic character)
उत्तर
Cs, Na, Li, K, Rb (increasing metallic character)
Li < Na < K < Rb < Cs
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संबंधित प्रश्न
Fill in the blank:
The formulae of chloride of metal M is MCl2. The metal M belongs to ……………. group.
Given below are some elements of the modern periodic table. Atomic number of the element is given in parentheses.
A(4), B(9), C(14), D(19), E(20)
(a) Select the element that has one electron in the outermost shell. Also, write the electronic configuration of this element.
(b) Which two elements amongst these belong to the same group? Give reasons for your answer.
(c) Which two elements amongst these belong to the same period? Which one of the two has bigger atomic radius?
Consider two elements 'X' (Atomic number 17) and 'Y' (Atomic number 20)
(i) Write the positions of these elements in the modern periodic table giving justification.
(ii) Write the formula of the compound formed by the combination of 'X' and 'Y'.
(iii) Draw the electron-dot structure of the compound formed and state the nature of the bond formed between the two elements ?
Which element has a total of two shells, with three electrons in its valence shell?
What happens to the metallic character of the elements as we move from left to right in a period of the periodic table?
How do you calculate the possible valency of an element from the electronic configuration of its atoms?
Moving down in the second group, number of valence electrons ______.
The electronic configuration of an element is 2, 8, 4. State it:
name and write its one physical property.
Name the period which is the shortest period of the periodic table.
Which of the following would weigh the least?
(Atomic masses C = 12, 0 = 16, Na = 23)
