each of these atoms are in group 2. which atom will have the smallest atomic radius?\nberyllium, be (2…

each of these atoms are in group 2. which atom will have the smallest atomic radius?\nberyllium, be (2 energy levels)\nmagnesium, mg (3 energy levels)\nbarium, ba (6 energy levels)

each of these atoms are in group 2. which atom will have the smallest atomic radius?\nberyllium, be (2 energy levels)\nmagnesium, mg (3 energy levels)\nbarium, ba (6 energy levels)

Answer

Explanation:

Step1: Recall atomic - radius trend

Atomic radius increases down a group as the number of energy levels increases.

Step2: Compare given elements

Beryllium (Be) has 2 energy levels, magnesium (Mg) has 3 energy levels, and barium (Ba) has 6 energy levels. Since Be has the fewest energy levels among them.

Answer:

Beryllium, Be