CHEMISTRY I Philippines INHS
Homework: Atoms, Molecules, and Ions
Part I: Research Time!
Directions: Name four elements with isotopes; describe each isotope and enumerate its uses. Write your answers
in the provided answer sheet. (5 points each)
1. The Hydrogen isotope deuterium (D, or 2H)- a nucleus made up of one proton and one neutron, and
twice the mass of regular hydrogen's nucleus. This isotope has an atomic weight of 2.014. They are
commonly applied in prototype fusion reactors and have military, industrial, and scientific applications.
The Hydrogen isotope tritium (T, or 3H)- Its nucleus, which consists of one proton and two neutrons, has
three times the mass of regular hydrogen's nucleus. This isotope has an atomic weight of approximately 3.
Biochemical studies, animal metabolism studies, and ground water transport assessments are all using
tritium as a tracer.
2. The Iodine isotope radioactive Iodine (I-131)- this isotope can emittes radiation. It has a half-life of
around eight days in radioactive decay with an isotope mass of 130.9061246. This is used in pulmonary,
brain and thyroid diagnostic. Thyroid cancer can also be treated with it. The RAI accumulates primarily in
thyroid cells, where it can damage the thyroid gland as well as any other thyroid cells that take up iodine,
with minimal effect on the rest of your body.
The Iodine isotope Iodine-125 (125I)- This isotope has a half-life of 59.43 days and lower energy, with a
neutrons of 72 and protons of 53. It is used in nuclear medicine imaging, biological assays, brachytherapy
to treat a variety of diseases, including prostate cancer, uveal melanomas and brain tumors.
3. The Helium isotope helium-3 (3He)- It is a stable helium isotope with one neutron and two protons.
Helium-3 has an isotope mass of 3.0160293. The uses of it are for dilution refrigerators, well logging and
research detectors, commercial instruments, basic research in condensed matter physics and for targets or
cooling in nuclear research. It has the potential to be utilized as a source of energy in future nuclear fusion
power plants.
The Helium isotope helium-4 (4He)- It is a stable helium isotope which is more abundant of the two
naturally occurring helium isotopes. Helium-4 has the same nucleus as an alpha particle, with two neutrons
and two protons. This is used to fill carnibal balloons.
1
Homework: Atoms, Molecules, and Ions
Part I: Research Time!
Directions: Name four elements with isotopes; describe each isotope and enumerate its uses. Write your answers
in the provided answer sheet. (5 points each)
1. The Hydrogen isotope deuterium (D, or 2H)- a nucleus made up of one proton and one neutron, and
twice the mass of regular hydrogen's nucleus. This isotope has an atomic weight of 2.014. They are
commonly applied in prototype fusion reactors and have military, industrial, and scientific applications.
The Hydrogen isotope tritium (T, or 3H)- Its nucleus, which consists of one proton and two neutrons, has
three times the mass of regular hydrogen's nucleus. This isotope has an atomic weight of approximately 3.
Biochemical studies, animal metabolism studies, and ground water transport assessments are all using
tritium as a tracer.
2. The Iodine isotope radioactive Iodine (I-131)- this isotope can emittes radiation. It has a half-life of
around eight days in radioactive decay with an isotope mass of 130.9061246. This is used in pulmonary,
brain and thyroid diagnostic. Thyroid cancer can also be treated with it. The RAI accumulates primarily in
thyroid cells, where it can damage the thyroid gland as well as any other thyroid cells that take up iodine,
with minimal effect on the rest of your body.
The Iodine isotope Iodine-125 (125I)- This isotope has a half-life of 59.43 days and lower energy, with a
neutrons of 72 and protons of 53. It is used in nuclear medicine imaging, biological assays, brachytherapy
to treat a variety of diseases, including prostate cancer, uveal melanomas and brain tumors.
3. The Helium isotope helium-3 (3He)- It is a stable helium isotope with one neutron and two protons.
Helium-3 has an isotope mass of 3.0160293. The uses of it are for dilution refrigerators, well logging and
research detectors, commercial instruments, basic research in condensed matter physics and for targets or
cooling in nuclear research. It has the potential to be utilized as a source of energy in future nuclear fusion
power plants.
The Helium isotope helium-4 (4He)- It is a stable helium isotope which is more abundant of the two
naturally occurring helium isotopes. Helium-4 has the same nucleus as an alpha particle, with two neutrons
and two protons. This is used to fill carnibal balloons.
1
