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प्रश्न
The similarities in the properties of a group of elements are because they have the same ______.
पर्याय
electronic configuration
number of outer electrons
atomic numbers
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उत्तर
The similarities in the properties of a group of elements are because they have the same number of outer electrons.
संबंधित प्रश्न
Na, Mg and Al are the elements of the same period of Modern Periodic Table having, one, two and three valence electrons respectively. Which of these elements (i) has the largest atomic radius, (ii) is least reactive? Justify your answer stating reason for each case.
For each of the following triads, name the element with the characteristics specified below:
| Elements | Least atomic radius | Chemically least reactive |
| (i) F, Cl, Br (ii) Li, Na, K |
.................... .................... |
.................... .................... |
An element barium has atomic number 56. Look up its position in the periodic table and answer the following question.
Is it more or less reactive than calcium?
What is the common feature of the electronic configuration of the elements at the end of period 2, and period 3?
How do you calculate the possible valency of an element from the electronic configuration of its atoms?
What is meant by a group in the periodic table?
Arrange the following in order of increasing radii:
N, O, P
An element belongs to the third period and Group IIIA (13) of the periodic table. State: the name of the element.
Name or state following with reference to the element of the first three periods of the periodic table.
The formula of the hydroxide of the element having electronic configuration 2, 8, 2.
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
Across a period from left to right in the Modern Periodic Table.
No. of electron shells _________; No. of valence electrons __________: Electronegativity increases Character of elements changes from electropositive to ________.
