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zzz [600]
3 years ago
14

Iodine-131 is a radioactive isotope that is used as a medical tracer to study and treat the thyroid gland. This radioactive elem

ent emits both beta particles and gamma waves. To effectively stop both beta particles and gamma waves, scientists use a chamber composed of...
A) concrete.
B) lead.
C) metal. (Not this one)
D) plastic. (Not this one)

I believe the answer is B, can someone confirm?
Chemistry
1 answer:
4vir4ik [10]3 years ago
8 0
Bonjeur monseur, la french are here! it seems you have a problem with the elements on earth. lead seems correct since it is indeed a harmful material
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Write the condensed ground-state electron configurations of these transition metal ions, and state which are paramagnetic:
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The electron configuration of  V³⁺ is [Ar]3d^2. The ion is paramagnetic because it has two unpaired electrons

<h3>What is paramagnetic?</h3>
  • A weak magnetic field supplied externally can weakly attract some materials, which then create internal magnetic fields that are directed in the same direction as the applied magnetic field. This phenomenon is known as paramagnetic.
  • Diamagnetic materials, in contrast, are attracted to magnetic fields and produce induced magnetic fields that are directed in the opposite direction from the applied magnetic field.
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To learn more about paramagnetic with the given link

brainly.com/question/18865305

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7 0
2 years ago
Or each set of elements represented in this periodic table outline, identify the principal quantum number, n , and the azimuthal
Tems11 [23]
The answer is potassium. It would be 4, and for neon would be 2. Just total which row of the periodic table you are on. The "L" tells you whether the highest-energy electron is in an "s" orbital (L=0) or a "p" orbital (L=1) or a "d" orbital (L=2) or an "f" orbital (L=3). The way in which these orbitals are filled is: for each of the first three rows (up to argon), two electrons in the "s" orbital are filled first, then 6 electrons in the "p"orbitals. The row where the potassium also starts with filling the "s" orbital at the new "n" level (4) but then goes back to satisfying up the "d" orbitals of n=3 before it seals up the "p"s for n=4.
5 0
3 years ago
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Is boron an element a compound a heterogeneous mixture or a homogeneous mixture?
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3 years ago
Potential energy due to the position of an object above earth surface is called
KengaRu [80]

ANSWER:

Potential energy due to the position of an object above Earth&#39;s surface is called gravitational  potential energy.

EXPLANATION:

Gravitational energy is the potential energy compared with gravitational force, as work is  needed to further things against Earth’s gravity. The potential energy due to high positions is  called gravitational potential energy, and is evidenced by water in an elevated storage or kept  behind a dam. If an article falls from one point to different point inside a gravitational field, the  force of gravitation will do actual work on the object, and the gravitational potential energy will  decrease by the same amount.

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What do atoms form when they bond chemically?
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