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प्रश्न
On moving from left to right in a period in the periodic table, the size of the atom.
विकल्प
increases
decreases
does not change appreciably
first decreases and then increases
उत्तर
decreases
Explanation -
On moving from left to right in a period in the periodic table, the size of the atom decreases.
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संबंधित प्रश्न
Name two elements that have two electrons in their outermost shells.
Name an element whose properties were predicted on the basis of its position in Mendeleev's periodic table.
What were the defects and anomalies in Mendeleeff's Periodic Table and how are they resolved by Moseley?
Give a reason for the following:
Mendeleev's contributions to the periodic table laid the foundation for the Modern Periodic Table.
According to Mendeleev’s periodic law, properties of elements are periodic function of their _______.
At the time of Mendeleev, the number of elements known was ______
Which of the following are the characteristics of isotopes of an element?
(i) Isotopes of an element have the same atomic masses
(ii) Isotopes of an element have the same atomic number
(iii) Isotopes of an element show the same physical properties
(iv) Isotopes of an element show the same chemical properties
In Mendeléev’s Periodic Table, gaps were left for the elements to be discovered later. Which of the following elements found a place in the periodic table later
Give an account of the process adopted by Mendeléev for the classification of elements. How did he arrive at “Periodic Law”?
List the features of Mendeleev’s Periodic Table.
