The ionic radius refers to the size of an ion. This size is affected by the atomic radius, the charge of the ion, and the electron configuration.

1. Ca2+ (Calcium ion): When Calcium loses two electrons to form Ca2+, its size decreases due to the loss of an electron shell.

2. K+ (Potassium ion): When Potassium loses one electron to form K+, its size also decreases due to the loss of an electron shell.

3. Cl- (Chloride ion): When Chlorine gains an electron to form Cl-, its size increases because the added electron increases electron-electron repulsion and expands the electron cloud.

4. Ar (Argon): Argon is a noble gas and does not typically form ions, so it does not have an ionic radius.

Comparing these, the Cl- ion has the largest ionic radius because gaining an electron increases its size more than the others. So, the answer is Cl-.

Question

The ionic radius refers to the size of an ion. This size is affected by the atomic radius, the charge of the ion, and the electron configuration.

1. Ca2+ (Calcium ion): When Calcium loses two electrons to form Ca2+, its size decreases due to the loss of an electron shell.

2. K+ (Potassium ion): When Potassium loses one electron to form K+, its size also decreases due to the loss of an electron shell.

3. Cl- (Chloride ion): When Chlorine gains an electron to form Cl-, its size increases because the added electron increases electron-electron repulsion and expands the electron cloud.

4. Ar (Argon): Argon is a noble gas and does not typically form ions, so it does not have an ionic radius.

Comparing these, the Cl- ion has the largest ionic radius because gaining an electron increases its size more than the others. So, the answer is Cl-.

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The ionic radius refers to the size of an ion. This size is affected by the atomic radius, the charge of the ion, and the electron configuration.

1. Ca2+ (Calcium ion): When Calcium loses two electrons to form Ca2+, its size decreases due to the loss of an electron shell.

2. K+ (Potassium ion): When Potassium loses one electron to form K+, its size also decreases due to the loss of an electron shell.

3. Cl- (Chloride ion): When Chlorine gains an electron to form Cl-, its size increases because the added electron increases electron-electron repulsion and expands the electron cloud.

4. Ar (Argon): Argon is a noble gas and does not typically form ions, so it does not have an ionic radius.

Comparing these, the Cl- ion has the largest ionic radius because gaining an electron increases its size more than the others. So, the answer is Cl-.

3. Which of the following has the largest ionic radius?Ca2+K+Cl-Ar

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