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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
Which is greater in size an atom or a cation?
Which is greater in size an atom or an anion?
Arrange the following in order of increasing radii:
CI- , CI
Write a scientific reason.
Atomic radius goes on increasing down a group.
Fill in the blanks.
Size of the atoms ______ from left to right across a period and ______ on descending in a group of normal elements.
Select the correct answer
Atomic radii of fluorine and neon in angstrom unit are
What happens to the atomic size of elements on moving from left to right in a period?
_______ is the distance between the nucleus of the atom and its outermost shell.
Atomic radius is expressed in the unit ______.
Right or wrong sentence.
The size of an atom depends on the number of valence electrons.
Write scientific reason.
In same period, boron and oxygen elements have different atomic size.
Which of the following is the correct order of size?
Which of the following is the correct order of atomic size?
When an atom of iodine becomes an iodine ion (I–) the radius will ______
Arrange the following elements in increasing order of their atomic radii.
- Li, Be, F, N
- Cl, At, Br I
Write the formula of the product formed when the element A (atomic number 19) combines with the element B (atomic number 17). Draw its electronic dot structure. What is the nature of the bond formed?
Which one has the largest size?
This question refers to the elements of the Periodic Table with atomic numbers from 3 to 18. Some of the elements are shown by letters, but the letters are not the usual symbols of the elements.
| 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| A | B | C | D | E | F | G | H |
| 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| I | J | K | L | M | N | O | P |
Which of these have least atomic size in period 3?
