Well Mendeleev<span> predicted the existence and properties of elements that werent discovered at the time</span>
Answer:
The length of the bond is determined by the number of bonded electrons (the bond order). The higher the bond order, the stronger the pull between the two atoms and the shorter the bond length. Generally, the length of the bond between two atoms is approximately the sum of the covalent radii of the two atoms.
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9. A
10. C
Answer:

Explanation:
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In this case, according to the given information, it turns out possible for us to infer this problem is about the application of the Gay-Lussac's gas law to relate the initial and final pressure and temperature as shown below:

Thus, solving for the final pressure, P2, and using the temperatures in Kelvins, we obtain:

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Answer: Total number of Protons PLUS Neutrons
Explanation:
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