well its is sometimes but barely, which is why most radioactive substances eventually settle on lead as their final element, crazy stuff.
It is as reactive as indium. Just kidding, it is reactive. Hoe reactive, more reactive than silver, but not as reactive as tin.
reactive
Hydrogen IS reactive
helium is non reactive.
Cerium is reactive but not highly reactive.
reactive.
it is reactive
sodium, calcium, magnesium, aluminium, zinc, iron, tin and led are metals more reactive than hydrogen.
fluorine is the most reactive
Manganese is not very reactive; the electronegativity is 1,55.
Reactive
no it is not reactive