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प्रश्न
The position of elements A, B, C, D and E in the periodic table are shown below:
|
Group 1 |
Group 2 |
Group 17 |
Group 18 |
|
|
|
|
D |
|
|
B |
C |
|
|
A |
|
|
E |
State which is most reactive (i) metal (ii) non-metal
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उत्तर
Most reactive
(i) Metals: Alkali metals (Group I); Caesium
(ii) Non-metals: Halogens (Group 17); Fluorine
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संबंधित प्रश्न
Taking the example of an element of atomic number 16, explain how the electronic configuration of the atom of an element relates to its position in the modern periodic table and how valency of an element is calculated on the basis of its atomic number.
How do the valency and the atomic size of the elements vary while going from left to right along a period in the modern periodic table?
Name the element that has two shells, both of which are completely filled with electrons.
In which part of a group would you separately expect the elements to have the greatest metallic character
State the trends in physical properties on moving down the group. Give an example to illustrate.
Why fluorine has higher E.N. than chorine?
With reference to the variation of properties in the Periodic table, which of the following is generally true?
An element A has 2 electrons in its fourth shell. State:
position in the periodic table
Fill in the blanks from the words A to F given below.
A: Decreases
B: Increases
C: Remains same
D: Increases by one
E: Electropositive
F: Electronegative
Down a group in the Modern Periodic Table.
No. of electron shells __________; No. of valence electrons ________; Electronegativity ________ Character of elements changes from _________ to ____________.
Which of the following would weigh the least?
(Atomic masses C = 12, 0 = 16, Na = 23)
