Iodine and Xenon

2.  Iodine is a chemical element with
symbol I and atomic number 53. The name is
from Greek ioeides, meaning violet or purple,
due to the color of elemental iodine vapor.
 Iodine and its compounds are primarily used
in nutrition, and industrially in the production
of acetic acid and certain polymers. Iodine's
relatively high atomic number, low toxicity, and
ease of attachment to organic compounds have
made it a part of many X-ray contrast materials
in modern medicine. Iodine has only one stable
isotope. A number of iodine radioisotopes are
also used in medical applications

3.  Iodine is found on Earth mainly as the highly
water-soluble , which concentrates it
in oceans and brine pools. In the universe and on
Earth, iodine's high atomic number makes it a
relatively rare element. However, its presence in
ocean water has given it a role in biology. It is the
heaviest essential element utilized widely by life in
biological functions. Iodine's rarity in many soils,
due to initial low abundance as a crust-element,
and also leaching of soluble iodide by rainwater,
has led to many deficiency problems in land
animals and inland human populations. Iodine
deficiency affects about two billion people and is
the leading preventable cause of intellectual
disabilities.

4.  Iodine is required by higher animals for
synthesizing thyroid hormones, which contain the
element. Because of this function, radioisotopes of
iodine are concentrated in the thyroid gland along
with nonradioactive iodine. If inhaled, the
radioisotope iodine-131, which has a high fission
product yield, concentrates in the thyroid, but is
easily remedied with non-radioactive potassium
iodide treatment.

5.  Iodine is a Chemical element with
symbol I and atomic number 53
 Iodine is used in nutrition
 Iodine has a high relatively atomic number
 Iodine has one only isotope
 Iodine is found on Earth mainly as the highly
water-soluble
 Iodine is required by higher animals for
synthesizing thyroid hormones

7.  Xenon is a chemical element with symbol Xe and atomic
number 54. It is a colorless, dense, odorless noble gas, that
occurs in the Earth's atmosphere in trace
amounts. Although generally unreactive, xenon can
undergo a few chemical reactions such as the formation
of xenon hexafluoroplatinate, the first noble gas
compound to be synthesized.
 Naturally occurring xenon consists of eight stable isotopes.
There are also over 40 unstable isotopes that undergo
radioactive decay. The isotope ratios of xenon are an
important tool for studying the early history of the Solar
System. Radioactive xenon-135 is produced from iodine-
135 as a result of nuclear fission, and it acts as the most
significant neutron absorber in nuclear reactors.
 Xenon is used in flash lamps and arc lamps, and as
a general anesthetic. The first excimer laser design used a
xenon dimer molecule (Xe2) as its lasing medium, and the
earliest laser designs used xenon flash lamps as pumps.
Xenon is also being used to search for hypothetical weakly
interacting massive particles and as the propellant for ion
thrusters in spacecraft.

8.  Xenon is a chemical element with
symbol Xe and atomic number 54
 Xenon consists of eight stable isotopes
 Xenon is used in flash lamps and arc lamps