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प्रश्न
Give the trends in atomic size on moving across the period left to right.
उत्तर
Atomic size decreases from left to right as the Atomic Number increases by one at each stage, with one proton added to the nucleus and one electron added to the valence shell. As nuclear attraction rises, the size of the atom decreases.
संबंधित प्रश्न
Arrange the following as per the instruction given in the bracket:
Mg, Cl, Na, S, Si (decreasing order of atomic size).
Write the name and symbol of the element from the description.
The noble gas with the smallest atomic radius.
Give scientific reasons for the following:
Atomic radius goes on decreasing while going from left to right in a period.
Fill in the blank by selecting the correct word from the bracket.
If an element has seven electrons in its outermost shell then it is likely to have the _____ atomic size among all the elements in the same period.
The size of an atom depends on the number of valence electrons.
Which of the following gives the correct increasing order of the atomic radii of O, F and N?
Which among the following elements has the largest atomic radii?
- 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.
Arrange the following as per the instruction given in the bracket:
Carbon, Fluorine, Beryllium (decreasing order of atomic size).
Which one of the following has the largest atomic radius?
