What was one important discovery that the Curies made? A material’s radioactivity cannot be changed by altering the material physically.
A material’s radioactivity can be weakened or intensified by changing it chemically.
Radioactive materials generally contain radium or polonium.
Radioactive materials are found only in the form of salts.

beta decay is the answer

shield volcanos are angry and get mad over the smallest things so much that there heads erupt   pahoehoe and a'a lava. a composite volcano is the poller opposite of a shield volcano. its   peaceful thing and knows how to control its emotions.      

since electrons are negative the answer is neagtaive

the seeing the electronic configuration we can say that the element is fluorine.

fluorine is the most electronegative element in the periodic table.

but by only seeing the configuration we cannot say about its reactivity because we don't know if its configuration after excitation or by addition of electrons.

but if not then, it is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. as the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.