Arrange the following four atoms in order from smallest to largest radius: Fluorine (F, 9); Neon (Ne, 10); Sodium (Na, 11); Magnesium (Mg, 12)
(a) F < Ne < Na < Mg
(b) Mg < Na < Ne < F
(c) Ne < F < Mg < Na
(d) Na < Mg < F < Ne
(e) Ne < Mg < F < Na
Answer: (c) Ne < F < Mg < Na