It is a poly atomic anion because it has more than one atom and a negative charge
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To calculate the atomic mass of a single atom of an element, add up the mass of protons and neutrons.
A
Explanation:
Weather can be defined as the day-to-day changes in the atmospheric parameters like temperatures, humidity, rainfall, and pressure. When these weather changes are observed for approximately over 30 years, the climate of the regions can be determined by understanding the patterns.