Total 8,232. Note: In addition to its drugstores, Walgreens also operates home care facilities and specialty, institutional and mail service pharmacies. Its Take Care Health Systems subsidiary manages more than 400 convenient care clinics at Walgreens drugstores.
These different versions of hydrogen are called isotopes. All isotopes of a particular element have the same number of protons, but have a different number of neutrons. If you change the number of neutrons an atom has, you make an isotope of that element.Currently, scientists know of 118 different elements.Some, like gold, silver, copper and carbon, have been known for thousands of years.f you change the number of neutrons an atom has, you make an isotope of that element. Currently, scientists know of 118 different elements. Some, like gold, silver, copper and carbon, have been known for thousands of years.
an isotope is an atom that is heavier or lighter than a normal atom of the same element. the number of protons is different. for example, carbon usually has an atomic mass of â¦ 12: 6 protons, 6 neutrons. but in carbon 14 (an isotope of carbon), there are 6 protons and 8 neutrons.toms with the SAME number of protons/electrons but DIFFERENT numbers of neutrons are called isotopes. Now ALL chemical properties of an atom are determined by the number of electrons in it ONLY (which by definition is equal to the number of protons in the nucleus).