Question

The increasing order of the atomic radii of the following elements is:

A. C

B. O

C. F

D. Cl

E. Br

• A. $\mathrm{B}<\mathrm{C}<\mathrm{D}<\mathrm{A}<\mathrm{E}$
• B. $\mathrm{C}<\mathrm{B}<\mathrm{A}<\mathrm{D}<\mathrm{E}$
• C. $\mathrm{A}<\mathrm{B}<\mathrm{C}<\mathrm{D}<\mathrm{E}$
• D. $\mathrm{D}<\mathrm{C}<\mathrm{B}<\mathrm{A}<\mathrm{E}$

Answer 1

The correct option is A

$\mathrm{B}<\mathrm{C}<\mathrm{D}<\mathrm{A}<\mathrm{E}$

The correct options are (a)

The Explanation for the correct options:

(a)

• Explanation: The atomic radius decreases as we move from left to right in a period with an increase in the nuclear charge of the element. The atomic radius increases when we go down a group because of the addition of an extra shell.
• The atomic radius of elements decreases with increasing atomic number in a specific period of the periodic table.
• $\mathrm{O}$ has a lower value than$\mathrm{F}$. $\mathrm{F}$is less than$\mathrm{Cl}$, while$\mathrm{Cl}$ is less than$\mathrm{C}$ and $\mathrm{C}$is the less than $\mathrm{Br}$

The Explanation for the incorrect options:

(b)

• Explanation: The atomic radius increases as one moves down the group. The atomic radius decreases as one moves from left to right in a period.
• As we move from left to right in a period with an increase in the nuclear charge of the element, the atomic radius decreases.
• $\mathrm{F}$ has a lower value than$\mathrm{O}$. $\mathrm{O}$is less than$\mathrm{C}$, while$\mathrm{C}$ is less than$\mathrm{Cl}$ and $\mathrm{Cl}$is the less than$\mathrm{Br}$.

(C)

• Explanation: Just like we move from left to right as an element's nuclear charge increases, the atomic radius decreases. Because of the addition of an extra shell, the atomic radius increases as we move down a group.
• On moving from left to right in a period, the atomic radius decreases
• $\mathrm{C}$ have a lower value than$\mathrm{O}$. $\mathrm{O}$is less than$\mathrm{F}$, while$\mathrm{F}$ is less than$\mathrm{Cl}$ and $\mathrm{Cl}$is the less than$\mathrm{Br}$.

(d)

• Explanation: The atomic radius decreases. When we go down a group, the atomic radius grows due to the addition of an extra shell.
• The atomic radius increases as one move down the group. The atomic radius decreases as one moves from left to right in a period.
• $\mathrm{Cl}$ has a lower value than$\mathrm{F}$. $\mathrm{F}$is less than$\mathrm{O}$, while$\mathrm{O}$ is less than$\mathrm{C}$ and $\mathrm{C}$is the less than $\mathrm{Br}$.

Hence, the correct option is (a): The atomic radius is the distance between the atom's center and its valence orbital.