Question

type the element in each list with the largest atomic radius: na, al, mg rb, f, n ca, sr, ba fr, be, k

Explanation:

Step1: Recall atomic - radius trend

Atomic radius increases down a group and decreases across a period.

Step2: Analyze Na, Al, Mg

Na, Mg, Al are in the same period. Na is the left - most, so it has the largest atomic radius among them.

Step3: Analyze Rb, F, N

Rb is in a lower period than F and N. So Rb has the largest atomic radius.

Step4: Analyze Ca, Sr, Ba

Ca, Sr, Ba are in the same group. Ba is at the bottom, so it has the largest atomic radius.

Step5: Analyze Fr, Be, K

Fr is in the lowest period among them. So Fr has the largest atomic radius.

Answer:

Na
Rb
Ba
Fr