For the first 20 elements below, indicate how each elements’ valence electrons act in a chemical reaction. Insert an L if an element loses electrons, a G if the element gains electrons, an E if the element can either lose or gain electrons, and a U if the element is generally unreactive. If you require the use of a text reader, open the file Valence Electrons Trend. Hydrogen (H) Lithium (Li) Beryllium (Be) Sodium (Na) Magnesium (Mg) Potassium (K) Calcium (Ca) Helium (He) Boron (B) Carbon (C) Nitrogen (N) Oxygen (O) Fluorine (F) Neon (Ne) Aluminum (Al) Silicon (Si) Phosphorus (P) Sulfur (S) Chlorine (Cl) Argon (Ar)