Question

storyline 1 exam
choose the atomic symbols that best complete the sentences.
na | k | rb | cs
cs | rb | k | na
compare the atomic radii of na, k, rb, and cs based on their relative positions on the periodic table. of the four elemental symbols, has the
smallest radius and has the largest radius

Explanation:

Atomic radius increases down a group in the periodic table. Among the elements \(Na\), \(K\), \(Rb\), and \(Cs\) (all in Group 1), \(Na\) is highest up (Period 3) and \(Cs\) is lowest down (Period 6). So, \(Na\) has the smallest atomic radius and \(Cs\) has the largest atomic radius.

Answer:

First blank: \(Na\), Second blank: \(Cs\)