Yttrium-90 is an important radioactive isotope used by doctors for cancer treatment. The isotope undergoes beta decay with a half life of 64 hrs with no alpha emission and very low amounts of gamma decay. Explain the following phenomenon in terms of ionization and penetration a) why would alpha decay be a poor choice for use in the human body?

b) why do we use lead shields to cover areas of the body not going through treatment?

56 moles of   lieter in chemistry

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.