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augestfaith
10.09.2021 •
Chemistry
What is the basic idea behind the Frye standard?
Group of answer choices
If a crime scene is still on fire, you do not need a warrant to enter the scene.
The judge is the gatekeeper of admissibility of evidence into court
Whatever is accepted by the general scientific community is acceptable as evidence into court
The jury can decide who is qualified to be an expert witness.
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Ответ:
Second question: There are a number of molecules whose total number of valence electrons is an odd number. It is not possible for all of the atoms in such a molecule to satisfy the octet rule. An example is nitrogen dioxide (NO2). Each oxygen atom contributes six valence electrons and the nitrogen atom contributes five for a total of seventeen.
Third question: Expanded octet occurs when an atom is able to have more than 8 valence electrons. For example, in SO₃, the sulfur atom forms 6 covalent bonds, hence it has 12 valence electrons. Expansion of octet is possible only from Period 3 elements onwards, due to the presence of low-lying empty d orbitals that can accommodate the extra electrons.
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