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प्रश्न
On moving from left to right in a periodic table, the size of the atom ______.
विकल्प
increases
decreases
decreases first and then increases
does not change
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उत्तर
On moving from left to right in a periodic table, the size of the atom decreases.
Explanation:
When moving from left to right across a period in the periodic table, the atomic size decreases. This happens because the number of protons in the nucleus increases, which increases the nuclear charge. This stronger positive charge pulls the valence electrons closer to the nucleus, effectively shrinking the atom’s radius.
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संबंधित प्रश्न
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| Atomic radius (pm) | 231 | 186 | 244 | 262 | 151 |
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Atomic size increases from left to right across a period.
Fill in the blank by selecting the correct word from the bracket.
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Right or wrong sentence.
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|
(i) |
(ii) |
|
(iii) |
(iv) |
Atomic number of a few elements are given below
10, 20, 7, 14
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Arrange the following as per the instruction given in the bracket:
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Mg2+, Mg, Mg+
Explain your choice.
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