Class 10SciencePeriodic Classification of ElementsMix Examples - Periodic Classification of Elements
MediumGive 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
Properties of the elements are given below. Where would you locate the following elements in the periodic table?
$(a)$ $A$ soft metal stored under kerosene.
$(b)$ An element with variable (more than one) valency stored under water.
$(c)$ An element which is tetravalent and forms the basis of organic chemistry.
$(a)$ $A$ soft metal stored under kerosene.
$(b)$ An element with variable (more than one) valency stored under water.
$(c)$ An element which is tetravalent and forms the basis of organic chemistry.
Difficult
View SolutionThe element $X$ has the following electron configuration $2, 8, 8, 2$. It means that it belongs to:
Medium
View SolutionStudy the variation in the atomic radii of Group $I$ elements given below and arrange them in an increasing order.
$(i)$ Name the elements which have the smallest and the largest atoms.
Group $I$ elements $Li: 52\, pm, Na: 61\, pm, K: 231\, pm, Rb: 244\, pm, Cs: 262\, pm$
$(ii)$ How does the atomic size vary as you go down a group?
$(i)$ Name the elements which have the smallest and the largest atoms.
| Group $I$ elements | $Li: 52\, pm, Na: 61\, pm, K: 231\, pm, Rb: 244\, pm, Cs: 262\, pm$ |
$(ii)$ How does the atomic size vary as you go down a group?
Medium
View Solution$(a)$ State Modern Periodic Law.
$(b)$ Elements $A, B, C$ and $D$ have atomic numbers $1, 8, 11$ and $19$ respectively. Choose the odd element and give reason for your answer.
$(b)$ Elements $A, B, C$ and $D$ have atomic numbers $1, 8, 11$ and $19$ respectively. Choose the odd element and give reason for your answer.
Easy
View SolutionAtomic radii of the elements of the second period are given below :
Period $II$ elements $B$ $Be$ $O$ $N$ $Li$ $C$ Atomic radius $(pm)$ $88$ $111$ $66$ $74$ $152$ $77$
$(i)$ Arrange them in decreasing order of their atomic radii.
$(ii)$ Are the elements now arranged in the pattern of a period in the Periodic Table?
$(iii)$ Which elements have the largest and the smallest atoms?
$(iv)$ How does the atomic radius change as you go from left to right in a period?
| Period $II$ elements | $B$ | $Be$ | $O$ | $N$ | $Li$ | $C$ |
| Atomic radius $(pm)$ | $88$ | $111$ | $66$ | $74$ | $152$ | $77$ |
$(i)$ Arrange them in decreasing order of their atomic radii.
$(ii)$ Are the elements now arranged in the pattern of a period in the Periodic Table?
$(iii)$ Which elements have the largest and the smallest atoms?
$(iv)$ How does the atomic radius change as you go from left to right in a period?
Medium
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