Answer:
Explanation: in exothermic reaction heat is released out
In endothermic reaction heat is absorbed
The Aufbau principle states that, hypothetically, electrons orbiting one or more atoms fill the lowest available energy levels before filling higher levels (e.g., 1s before 2s). In this way, the electrons of an atom, molecule, or ion harmonize into the most stable electron configuration possible.
Its a chemical reaction because both are affected by the reaction and changed. hope this helps (ू• o •ू )
Answer:
Pro exercise con suffication
Explanation:
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D. They all have the same number of valence electrons.
