Read the given passage and answer the questions that follow: Elements are arranged in the Modern Periodic table in increasing order of their atomic numbers. Metals are on the left hand side and middle of the periodic table mainly and non-metals are on the right hand side. A zig-zag diagonal line divides metals and non-metals. Elements near the zig-zag line are called metalloids. Elements of the same group have the same number of valence electrons but different number of shells. Elements of the same period have different numbers of valence electrons but the same number of shells. Elements in the middle of the periodic table are called transition metals. Why are group 1 elements soft and have low melting and boil