Technetium
is a chemical element with symbol Tc and atomic number 43. Classified as a transition metal, Technetium is a solid at room temperature.
What does Kr and K have in common?
Potassium
(K) and Krypton (Kr) are in the same group, so they have the same number of valence electrons. … Potassium (K) and Krypton (Kr) are in the same group, so they have the same number of valence electrons. Potassium is more reactive, because it has less electron shells than Krypton.
What is TC on the periodic table?
Technetium
is a chemical element with symbol Tc and atomic number 43. Classified as a transition metal, Technetium is a solid at room temperature.
What do the elements Be and Mg have in common?
They are
beryllium (Be), magnesium (Mg)
, calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra). The elements have very similar properties: they are all shiny, silvery-white, somewhat reactive metals at standard temperature and pressure.
What does TC 99 decay into?
Technetium-99 (
99
Tc) is an isotope of technetium which decays with a half-life of 211,000 years to
stable ruthenium-99
, emitting beta particles, but no gamma rays.
Does the human body use technetium?
Technetium and Health
Once in the human body, Tc-99 concentrates in the thyroid gland and the gastrointestinal tract. … The Tc-99m used in medical diagnostics has a short, six
-hour half-life and does not remain in the body
.
What does beryllium and magnesium have in common?
Beryllium, Magnesium, Calcium, Strontium, Barium, Radium
Because the outer electron structure in all of these elements is similar, they all have somewhat
similar chemical and physical properties
. All are shiny, fairly soft—although harder than the alkali metals—and most are white or silvery colored.
What is the highest electronegativity value?
The electronegativity scale was developed by Nobel Prize winning American chemist Linus Pauling. The largest electronegativity (
3.98
) is assigned to fluorine and all other electronegativities measurements are on a relative scale.
Which is more reactive potassium or Krypton?
Krypton is more reactive than Potassium
because it has a full outer shell. Potassium (K) and Krypton (Kr) are in the same group, so they have the same number of valence electrons. Potassium is more reactive, because it has less electron shells than Krypton.
Why is Group 2 called alkaline earth metals?
Beryllium, magnesium, calcium, strontium, barium and radium are the elements in Group 2. For two reasons, these elements are referred to as Alkaline Earth metals,
Their oxides remain in the crust of the earth and are very heat-stable
. … The elements of Group 2 of the periodic table are alkaline earth metals.
How many transition metals are there?
Most scientists simply regard the transition metals as the elements in the d-block (groups 3-12) on the periodic table. There are total of
38 elements
in this group including Cobalt, Nickel, Iron, Rhodium, Gold, Silver, Cooper, Scandium, Titanium, Vanadium, Manganese, Zinc and Mercury.
Where are the most active metals located?
The elements toward the bottom left corner of the periodic table
are the metals that are the most active in the sense of being the most reactive.
What is TC 99 used for in medicine?
Technetium-99m is used to
image the skeleton and heart muscle in particular
, but also for brain, thyroid, lungs, liver, spleen, kidney, gall bladder, bone marrow, salivary and lachrymal glands, heart blood pool, infection and numerous specialized medical studies.
What are the risks of TC 99?
- Blurred vision.
- chest pain or discomfort.
- confusion.
- dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position.
- fainting.
- fast, slow, or irregular heartbeat.
- hives, itching, or redness.
- lightheadedness.
Why is TC 99 used in medical diagnostics?
Tc-99m is
the preferred tracer for a number of scans
used in medicine worldwide to help diagnose medical conditions. Tc-99m scans are used to detect a wide range of conditions including injuries, infections, tumours, heart disease, thyroid abnormalities, kidney conditions and also to guide some cancer procedures.
Is technetium toxic to humans?
Once in the human body, Tc-99 concentrates in the thyroid gland and the gastrointestinal tract. The body, however, constantly excretes Tc-99 once it is ingested. As with any other radioactive material, there is an increased chance that cancer or other adverse health affects can result from exposure to radiation.
