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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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Tresset [83]
Your just answering the questions..? lol
5 0
2 years ago
Which of the following violates the Aufbau principle?
kondor19780726 [428]

E and B

Explanation:

The last option violates Aufbau's principle.

Aufbau's principle states that "the sublevels with lower energies are filled up before those with higher energies."

This implies that orbitals are not filled based on numerical order but on their energy levels.

The order is as follows;

   1s 2s 2p 3s 3p 4s 3d  e.t.c

In B, the 3s was not filled before jumping to 3p

In E, 3p was not filled before jumping to 3d and 3d was not even the next orbital.

learn more:

Atomic orbital brainly.com/question/1832385

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3 0
3 years ago
Alkaline earth metals electronegativity
Alex

It is usually measured on the Pauling scale, on which the most electronegative element (fluorine) is assigned an electronegativity of 4.0. Each of these elements has a low electronegativity on the Pauling scale, and the electronegativities clearly decrease down the group.

7 0
3 years ago
I need to have a sentence with the word neap tide in it.
olchik [2.2K]
In the absence of neap tide transect data this hypothesis cannot be tested directly, but three pieces of indirect evidence weigh against it as a complete explanation.
3 0
3 years ago
A student assisting with the experiment would observe all of the following about the electron transport chain EXCEPT:A. Electron
zheka24 [161]

Answer:

C. All electron carriers are mobile and hydrophobic

Explanation:

Hello,

In this case, it is widely known that the electron carriers move inside the inner mitochondrial membrane and consequently move electrons from one to another. In such a way, they are mobile, therefore they are largely hydrophobic as long as they are inside the membrane.

For instance, the cytochrome c is a water-soluble protein in a large range, therefore, the answer is: C. All electron carriers are mobile and hydrophobic.

Best regards.

5 0
3 years ago
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