Which of the following is true of both chlorine and sodium atoms?

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.

thats a little if u want the answer just look it up on google thats what i do haha : )

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