Give two reasons to explain how the metallic character of elements varies: $(a)$ in a group,$(b)$ in a period.
(N/A)
| Characteristic | Metallic character in a group | Metallic character in a period |
| $1.$ Effective nuclear charge | The effective nuclear charge experienced by valence electrons decreases because the outermost electrons are farther from the nucleus due to the addition of new shells. | The effective nuclear charge experienced by valence electrons increases,holding the outermost electrons more tightly. This occurs because the number of shells remains constant across a period. |
| $2.$ Tendency to lose or gain electrons | The tendency to lose electrons increases as we move down a group. Consequently,metallic character and basic character increase. | The tendency to gain electrons increases due to the increased nuclear charge. Consequently,non-metallic character and acidic character increase. |
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Similar Questions
$(a)$ Electropositive nature of the element$(s)$ increases down the group and decreases across the period.
$(b)$ Electronegativity of the element decreases down the group and increases across the period.
$(c)$ Atomic size increases down the group and decreases across a period (left to right).
$(d)$ 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 $9$:
$(a)$ Name the most electropositive element among them.
$(b)$ Name the most electronegative element.
$(c)$ Name the element with the smallest atomic size.
$(d)$ Name the element which is a metalloid.
$(e)$ Name the element which shows maximum valency.
$(b)$ Electronegativity of the element decreases down the group and increases across the period.
$(c)$ Atomic size increases down the group and decreases across a period (left to right).
$(d)$ 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 $9$:
$(a)$ Name the most electropositive element among them.
$(b)$ Name the most electronegative element.
$(c)$ Name the element with the smallest atomic size.
$(d)$ Name the element which is a metalloid.
$(e)$ Name the element which shows maximum valency.
Difficult
View SolutionWhich of the following statements is not a correct statement about the trends when going from left to right across the periods of the periodic table?
Medium
View SolutionThe atomic number of an element is $17$. Predict $(a)$ its valency,$(b)$ whether it is a metal or non-metal,$(c)$ its relative size with respect to other members of its group. Justify your answer in each case.
Medium
View SolutionWhat property do all elements in the same column of the Periodic Table as fluorine have in common?
Easy
View SolutionArrange the following metals in decreasing order of their atomic size: $Ca, Mg, Ba, Be$.
Easy
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