If you wanted to predict which elements are explosive how would you organize the periodic table?

If a || b and e || f, what is the value of y ?

This large tectonic plate is bounded on three sides by whats know as the ring of fire. what is the name of this tectonic plate? a) pacific plate b) eurasian plate c) north american plate d) indo- australian plate plz it's science but there's no option for science so i picked chemistry

What is the percentage of hydrogen in nitrogen trihydride