Problem: Which of the following correctly lists the five atoms in order of increasing size (smallest to largest)?A) O < F < S < Mg < BaB) F < O < S < Mg < BaC) F < O < S < Ba < MgD) O < F < S < Ba < MgE) F < S < O < Mg < Ba

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We’re being asked to rank the given set of elements in order of increasing atomic radius.

Atomic radius represents the distance from the nucleus to the outer shell of an element. 

Trend of the atomic radius in the periodic table:

decreases going from left to right of a period

increases going down a group

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Problem Details

Which of the following correctly lists the five atoms in order of increasing size (smallest to largest)?

A) O < F < S < Mg < Ba

B) F < O < S < Mg < Ba

C) F < O < S < Ba < Mg

D) O < F < S < Ba < Mg

E) F < S < O < Mg < Ba

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