Chloride ion and potassium ion are isoelectronic. Then:

Important Questions on Periodic Properties and Variations of Properties – Physical and Chemical

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Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

Which of the following orders of ionic radii is correctly represented?

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Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

The correct order of atomic radii in group $13$ elements is

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Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

In comparison to boron, beryllium has:

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Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

For ${\mathrm{Na}}^{+}, {\mathrm{Mg}}^{2+},\mathrm{ }{\mathrm{F}}^{-}$ and ${\mathrm{O}}^{2-}$, the correct order of increasing ionic radii is:

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Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

The species $\mathrm{A}\mathrm{r},\mathrm{ }{\mathrm{K}}^{+}$ and $\mathrm{C}{\mathrm{a}}^{2+}\mathrm{ }$ contain the same number of electrons. In which order do their radii increase?

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Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

The correct order of the ionic radii of ${\mathrm{O}}^{2-},{\mathrm{N}}^{3-},{\mathrm{F}}^{-},{\mathrm{Mg}}^{2+},{\mathrm{Na}}^{+}$ and ${\mathrm{Al}}^{3+}$ is :
 

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Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

The size of the iso-electronic species $\mathrm{C}{\mathrm{l}}^{-}$ , Ar and $\mathrm{C}{\mathrm{a}}^{2+}$ is affected by:

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Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

What is the correct order of atomic radii of the following atoms?

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Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

The effective nuclear charge of an element with three valence electrons is $2.60$ . What is the atomic number of the element?

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Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

Among the element Li, N, C and Be, one with the largest atomic radius is

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Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

The correct order of ionic size of ${\mathrm{N}}^{3-},{\mathrm{Na}}^{+},{\mathrm{F}}^{-},{\mathrm{Mg}}^{2+}$ and ${\mathrm{O}}^{2-}$ is : 

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Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

The ionic radii $\left(\text{in}\mathrm{ Å}\right)$ of ${\mathrm{N}}^{3-},\mathrm{ }{\mathrm{O}}^{2-}\mathrm{ }$ and $\mathrm{ }{\mathrm{F}}^{-}\mathrm{ }$ are respectively:

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Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

Which of the following arrangements is correct regarding the three types of radii for an atom?

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Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

The ionic radii of ${\mathrm{O}}^{2–}, {\mathrm{F}}^{–}, {\mathrm{Na}}^{+}$ and ${\mathrm{Mg}}^{2+}$ are in the order:

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The effective nuclear charge for an electron in $\mathrm{n}=2$ shell in a fluorine atom will be, (calculated according to Slater's rules):

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Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

Among the isoelectronic ions$\left({\mathrm{O}}^{2-}, {\mathrm{N}}^{3-}, {\mathrm{Mg}}^{2+}, {\mathrm{Na}}^{+}\right),$ the ions with the least and the highest ionic radius are, respectively

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Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

Covalent bond length of a chlorine molecule is $1.98 \stackrel{\mathrm{o}}{\mathrm{A}}$. Covalent radius (in $\stackrel{\mathrm{o}}{\mathrm{A}}$) of chlorine atom is _________

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Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

Which one of the following has largest ionic radius ?

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Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

The correct order of atomic radii is:

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Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

In general, the properties that decrease and increase down a group in the periodic table, respectively, are :