Answer: A
Explanation:
As per Bohr model, the shells from innermost to outermost are filled in the order: 2, 8, 8, and so on (that's a bit more advanced level). The inner shells, which are closest to the nucleus, are filled first.
Hence, the inner shell has space for two electrons only. It cannot occupy 3 or 4 electrons.
Innermost shell = 2 electrons
Now, carbon has six electrons in total. So, 6-2 = 4 electrons are left.
The rest four electrons will go in the 2nd shell which can occupy maximum 8 electrons.
So, 2nd shell = 4 electrons
=> Electronic configuration of Carbon: 2, 4
Answer:
If the immune system has a destructive and autoimmune response, it produces specific antibodies, which bind to the receptors of the thyroid cells and destroy them thinking that they are antigens or factors not characteristic of the body.
Explanation:
This happens because the thyroid cells do not present on its surface the histocompatibility complex, which is a surface protein similar to the proper and non-proper "seal", that is, it is the demarcation by which the antibodies and the cells are guided to recognize what foreign to the organism.
The histocompatibility complex is sometimes absent or rather mutated, thus generating that these cells are considered not their own and that the antibody is a receptor in order to generate the autolysis pathway or even the immune defense pathway.
Answer by YourHope:
Hi! :)
Which of the following are binary ionic compounds?
C) Copper (II) sulfide
D) Dinitrogen tetroxide!
Have a BEAUTIFUL day~
I think a glucose frenitique
Answer: " erythrocyte sedimentation rate (ESR) " .
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Hope this helps!
Best of luck!
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