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