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denpristay [2]
3 years ago
12

The model below shows a carbide ion.

Biology
2 answers:
andreyandreev [35.5K]3 years ago
6 0

Answer:

add 2 electrons

Explanation:

Add 2 electrons to carbide atom make it neutral because there are two unpaired electrons present in the carbide atom and it has -2 charge. So the carbide required two electrons for pairing and make the carbide atom neutral.  for adding two electrons its all unpaired electrons paired to other two electrons which complete its valency and make it a stable atom.

77julia77 [94]3 years ago
4 0

Answer:

B

Explanation:I did the test

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Answer:

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They affect populations and species more slowly than short-term changes

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Explanation:

Environmental changes occur when natural phenomenon and activities if humans brings about a disturbance of the natural environment thereby causing a change or impact on the ecosystem of the environment.  Environmental changes could be short-term or long-term. Short-term changes occur within minutes, days, weeks or more, and usually has a drastic impact on a population. Short-term change often do not allow organism in an environment to adapt well, and could lead to migrration or extinction of such species of organisms.

Long-term environmental change, on the other hand takes thousands or more years to occur. They occur gradually that their impact on organisms is barely noticeable. It gives enough time for the species of organisms in the environment to adapt. It could bring about a change in the DNA of organisms over time. An example of long-term environmental change is global warming resulting from climate change.

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