Question: D1. One atom has 20 protons and a mass number of 44. Another atom has 20 protons and a mass number of 40. (a)

D1. One atom has 20 protons and a mass number of 44.

D1. One atom has 20 protons and a mass number of 44. Another atom has 20 protons and a mass number of 40. (a) What is the similarity and dissimilarity in these atoms? (b) The atom combines with phosphate ion. Write the chemical forfmula and chemical name of the compound. (c) What is the valency and oxidation number of an atom in the elemental form?

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