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प्रश्न
Why is the size of sodium is greater than magnesium?
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उत्तर
Since atomic number of magnesium is more than sodium but the numbers of shells are same, the nuclear pull is more in case of Mg atom. Hence its size is smaller than sodium.
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संबंधित प्रश्न
Arrange the elements of second and third periods in increasing order of their atomic size (excluding noble gases).
Why is the size of neon greater than fluorine?
Which is greater in size an atom or a cation?
Write the name and symbol of the element from the description.
The noble gas with the smallest atomic radius.
Write a scientific reason.
Atomic radius goes on increasing down a group.
What happens to the atomic size of elements on moving from left to right in a period?
Right or wrong sentence.
Moving from left to right, the size of the atom decreases.
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?
- Electropositive nature of the element(s) increases down the group and decreases across the period
- Electronegativity of the element decreases down the group and increases across the period
- Atomic size increases down the group and decreases across a period (left to right)
- Metallic character increases down the group and decreases across a period.
On the basis of the above trends of the Periodic Table, answer the following about the elements with atomic numbers 3 to 9.
- Name the most electropositive element among them
- Name the most electronegative element
- Name the element with smallest atomic size
- Name the element which is a metalloid
- Name the element which shows maximum valency.
Which one has the largest size?
