The isoelectric point (pI) of an amino acid isthe pH at which the net charge of thatmolecule equals zero, i. e., the + and – charges arebalanced). Calculate the pI for
histidine (draw all 4 of the ionic forms starting with thefully protonated species. Identify the pKa values of each ionization and find the specieswith no net charge)

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.

i think the answer is terrae but not 100 percent sure. ▓▬▬ §