That's a loaded question. Well to me, through what I have heard from others and theories, I imagine there was other universes before us. It wasn't just nothingness, there was another universe, perhaps in another dimension that either ended or is still around today. Alternate dimensions are a theory, so it was probably just a matter of when ours would be born. We could've been the result of reaching the singularity in a black hole or we could've been the continuation of a grand generation of universes. Either way, I think before us there was other things that filled the void of darkness that we imagine to be before us.
According to the octet rule, if an atom has fewer than 8 electrons in the outer most energy level, it will react with other nearby atoms to give, receive or share electrons until it has a full outer shell.
The octet rule refers to the tendency of atoms to prefer eight electrons in their valence shell.
If the atom has less than 8 electrons, the atoms tend to react to form more stable compounds.
The discussion of the octet rule does not consider d or f electrons. It is useful for main group elements because only s and p electrons participate in the octet rule.
Atoms are reacted to be as stable as possible. Complete octets are very stable because all orbitals are full. Since atoms with higher stability have less energy, reactions that increase the stability of atoms release energy in the form of heat or light.
Learn more about octet rule here : brainly.com/question/865531
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Answer: The object moves forward at 5 m/s, stops, and then changes velocity.
Explanation:
With the information given in the question we can graph the points (image attached).
As we can observe, in the first segment of the graph the velocity is increasing linearly (at a constant rate) and is 5 m/s, then in the second segment we can see the position of the object remains the same from second 2 to second 4, which means the object is stopped.
Finally, in the third and last segment, we can observe a change in velocity (at a negative constant rate, because is decreasing), which is decreasing until the object stops.
