In which row are the chemical elements in order of increasing atomic radius 1) K-Na-Li 2) F-O-N

In which row are the chemical elements in order of increasing atomic radius 1) K-Na-Li 2) F-O-N 3) P-S-Cl 4) Ca-Mg-Be

The radius of the atom increases from top to bottom and from left to right according to the table of D.I. Mendeleev.
1) K-Na-Li the radius of the atom decreases;
2) F-O-N the radius of the atom decreases;
3) P-S-Cl the radius of the atom increases;
4) Ca-Mg-Be the radius of the atom decreases.
Answer: 3) P-S-Cl the radius of the atom increases.



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