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C. 12 ( the atomic number is equal to the number of protons)
D. 12 ( atomic mass - atomic number 24-12)
E. 12 ( number of protons and electrons in an atom are the same)
i, 2 electrons
ii 8 electrons
iii 2 electrons
F. 2

In the progressive era, progressives passed laws that supported open competition and business environment in the society. Those laws created some conflicts in society but they (later on) brought good things for people. The reformers of today try to deal with problems of class and race by forming laws and rights for their betterment.