Question

what has the greatest atomic radius? o n si al what has the greatest ionic radius? o n si al what has the greatest ionization energy? o n si al what has the greatest electronegativity? o n si al

Explanation:

Step1: Recall periodic - table trends for atomic radius

Atomic radius increases down a group and decreases across a period. O (oxygen), N (nitrogen) are in period 2, Si (silicon) and Al (aluminum) are in period 3. Since period 3 elements are larger than period 2 elements in general, and among Al and Si, Al is to the left of Si in the same period. So Al has a larger atomic - radius among the given elements.

Step2: Recall periodic - table trends for ionic radius

For ions, anions are larger than cations. O and N form anions, Si and Al form cations. Among O and N, O has a larger ionic radius as it is below N in the same group and anions of elements in the same group increase in size down the group.

Step3: Recall periodic - table trends for ionization energy

Ionization energy increases across a period and decreases down a group. O has a relatively high ionization energy among these elements as it is in period 2 and is more to the right compared to N in the same period, and Si and Al are in period 3 with lower ionization energies.

Step4: Recall periodic - table trends for electronegativity

Electronegativity increases across a period and decreases down a group. O is the most electronegative among these elements as it is more to the right in period 2 compared to N, and Si and Al are in period 3 with lower electronegativities.

Answer:

1. What has the greatest atomic radius? Al
2. What has the greatest ionic radius? O
3. What has the greatest ionization energy? O
4. What has the greatest electronegativity? O