Final answer:
The metals Au, Ag, Cu, Al, Zn, Fe, Mg, Ca, Na, K are arranged in increasing order of reactivity as Au, Ag, Cu, Al, Zn, Fe, Mg, Ca, Na, K.
Step-by-step explanation:
The reactivity of metals is largely determined by the ease at which they lose electrons and form positive ions, and this ability is related to the metals' position on the periodic table. Using the principles of periodicity and reactivity, the metals Au, Al, Ag, Cu, Mg, Fe, Na, Zn, K, Ca can be arranged in increasing order of reactivity as follows: Au, Ag, Cu, Al, Zn, Fe, Mg, Ca, Na, K. This order is determined by how easily each metal forms positive ions or reacts with other substances, which is in turn influenced by their position on the periodic table.
It is important to note that K (Potassium) and Na (Sodium) are Alkali Metals and are among the most reactive metals because they belong to Group 1 of the periodic table and hence possess one electron in their outermost shell which can be easily lost to form a positive ion. On the other hand, Au (Gold), Ag (Silver), and Cu (Copper) show minimal reactivity due to their electron configurations and positions on the periodic table.
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