Answer:
➢ There are eight lone pairs of electrons in each of the three resonance structures of NO3- ion. These <u>eight lone pairs</u> are provides by three oxygen atoms. There are no lone pairs on nitrogen atom.

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Answer:
A change in a substance where one or more new substances form
Explanation:
Answer:
"Ecosystem is the major ecological unit. It has both structure and functions. The structure is related to species diversity. The more complex is the structure the greater is the diversity of the species in the ecosystem. The functions of ecosystem are related to the flow of energy and cycling of materials through structural components of the ecosystem."
Explanation: