Question

question 3 of 25
which of these elements has the smallest atomic radius?
a. ge
b. se
c. as
d. br

Explanation:

Step1: Recall atomic - radius trend

Atomic radius decreases across a period from left to right in the periodic table.

Step2: Locate elements in periodic table

Ge (Germanium), As (Arsenic), Se (Selenium), and Br (Bromine) are all in the fourth period. Ge is in group 14, As in group 15, Se in group 16, and Br in group 17.

Step3: Determine the element with smallest radius

Since atomic radius decreases across a period, Br which is the most right - hand element among them will have the smallest atomic radius.

Answer:

D. Br