Final answer:
To rank metals by increasing reactivity, we consider their group and period in the periodic table. In general, reactivity increases down a group and from right to left across a period. Nickel and Silver are less reactive, whereas group 2 metals like Beryllium, Magnesium, Calcium, Strontium, and Barium increase in reactivity down the group, with Radium being the most reactive.
Step-by-step explanation:
To place the given atoms in increasing order of metallic reactivity, we need to consider their positions in the periodic table as well as their general properties. Reactivity in metals often increases as we move down a group because the atomic size increases, making it easier for the metal to lose electrons and react. It also varies across periods, with reactivity generally increasing as we move from right to left across the periodic table. For the elements listed (Aluminum, Barium, Calcium, Nickel, Silver, Strontium, Beryllium, Radium, Magnesium, Tin), we can arrange them in increasing metallic reactivity as follows:
- Nickel (transition metal, less reactive)
- Silver (transition metal, less reactive)
- Tin (post-transition metal, moderately reactive)
- Aluminum (post-transition metal, moderately reactive)
- Beryllium (Group 2, less reactive among alkaline earth metals)
- Magnesium (Group 2, more reactive than Be but less than Ca)
- Calcium (Group 2, more reactive than Mg)
- Strontium (Group 2, more reactive than Ca)
- Barium (Group 2, more reactive than Sr)
- Radium (Group 2, most reactive and radioactive)