abelxoconda abelxoconda 26-02-2019 Biology contestada 15 points and brainliest! Word Bank: Acid, atomic number, base, buffer, chemical bond, chemical reaction, covalent bond, crystalline, hydrophilic, hydrophobic, ionic bond, isotope, matter, neutron, pH, physical property, polar molecule, proton, radical, radioactive The number of protons in the nucleus of the atom is called the _______.