During an investigation, a scientist heated 123.6 g of copper carbonate till it decomposed to form a black residue.

Three alkali metals in group 1 are a. calcium, strontium, barium b. boron, aluminum, gallium c. sodium, potassium, rubidium d. fluorine, iodine, chlorine

Which element is the least metallic between cadmium, silver, zinc, or iron?

From the options provided for each element below, choose the properties that it may have based on its location in the periodic table fluorine (f): highly reactive nonmetal shiny a conductor