whats wrong in this    Lithium is a main group metal and sodium is a main group metal. Lithium is in group 1A (1), and sodium is in group 1A (1). Titanium is a transition metal and gallium is a transition metal. Germanium is a metalloid and arsenic is a main group metal. Germanium is in group 4A (14), and arsenic is in group 5A (15). Argon is a nonmetal and bromine is a nonmetal. Argon is in group 8A (18), and bromine is in group 7A (17). Nitrogen is a nonmetal and oxygen is a nonmetal. Nitrogen is in group 5A (15), and oxygen is in group 6A (16).

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