$(a)$ How does electropositivity of elements get affected as we move :
$(i)$ down a group
$(ii)$ across a period?
$(b)$ Which atomic property increases both as we move across a period or down a group?
$(i)$ down a group
$(ii)$ across a period?
$(b)$ Which atomic property increases both as we move across a period or down a group?
(N/A) $(i)$ Electropositive character increases down a group because the atomic size increases and the effective nuclear charge decreases,making it easier to lose electrons.
$(ii)$ Electropositive character decreases across a period because the atomic size decreases and the effective nuclear charge increases,making it harder to lose electrons.
$(b)$ Atomic number and atomic mass increase both across a period and down a group.
$(ii)$ Electropositive character decreases across a period because the atomic size decreases and the effective nuclear charge increases,making it harder to lose electrons.
$(b)$ Atomic number and atomic mass increase both across a period and down a group.
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Similar Questions
Atomic 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
View SolutionName two elements you would expect to show chemical reactions similar to magnesium. What is the basis for your choice?
Medium
View SolutionList any two properties of the elements belonging to the first group of the modern periodic table.
Easy
View SolutionWrite true or false for the statement: The term atomic size refers to the distance between the centre of the nucleus and the penultimate shell of an isolated atom.
Easy
View SolutionThe position of three elements $A$, $B$, and $C$ in the Periodic Table are shown below:
Group $16$ Group $17$ - - - $A$ - - $B$ $C$
$(a)$ State whether $A$ is a metal or non-metal.
$(b)$ State whether $C$ is more reactive or less reactive than $A$.
| Group $16$ | Group $17$ |
| - | - |
| - | $A$ |
| - | - |
| $B$ | $C$ |
$(a)$ State whether $A$ is a metal or non-metal.
$(b)$ State whether $C$ is more reactive or less reactive than $A$.
Medium
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