Chemistry
What are the components responsible for acid rain?

Carbon dioxide (CO2) and Carbon monoxide (CO)
Sulphur dioxide (SO2) and Nitrogen oxides (NOx)
Nitrogen monoxide (NO) and Carbon monoxide (CO)
Oxides of carbon (COx) and Oxides of nitrogen (NOx)

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Chemistry
Atoms of different elements have

Same atomic number and same electronic configuration
Different atomic number and different number of valence electrons
Different atomic number and same eletronic configu-ration
Same number of electrons and neutrons

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