Que son los halogenos {porfavor nesecito la respuesta resumidad en propias palabras ya que la maestra no quiere que sea la misma que esta en google}

Halogens correspond to elements in the periodic table located in group VIIA: fluorine, chlorine, bromine, iodine, astatine and tenese

Explanation:

As characteristics: they have valence -1, they form diatomic compounds among themselves, they have high ionization energies, they have high electronic affinity, they are toxic and scarce in nature.

i can't see the full page, therefore, can't answer it

explanation:

amber has allowed scientists to study dna that has been preserved over millions of years.