Question

list the following elements in increasing atomic radii. barium calcium chlorine phosphorus zinc cl<ca<ba<p<zn zn<ba<ca<p<cl cl<p<zn<ca<ba ba<ca<zn<p<cl

Explanation:

Step1: Recall atomic - radius trends

Atomic radius increases down a group and decreases across a period from left to right in the periodic table.

Step2: Locate the elements in the periodic table

Chlorine (Cl) is in Group 17 and Period 3. Phosphorus (P) is in Group 15 and Period 3. Zinc (Zn) is in Group 12 and Period 4. Calcium (Ca) is in Group 2 and Period 4. Barium (Ba) is in Group 2 and Period 6.

Step3: Compare atomic radii

Since Cl and P are in the same period (Period 3), and P is to the left of Cl, P has a larger atomic - radius than Cl. Among Zn, Ca, and Ba, Ba is in the lowest period (Period 6), so it has the largest atomic radius. Ca and Zn are in the same period (Period 4), and Ca is to the left of Zn, so Ca has a larger atomic radius than Zn.

Answer:

C. Cl<P<Zn<Ca<Ba