What is the numerical value for the standard cell potential of the following reaction? 2Cr2(aq) + 3Cu(s) → 2Cro) + 3Cu2+ (aq)
a) -1.25 V
b) -0.57 V
c) +0.57 V
d) +1.25 V

Iknow the answer is a but i don't know why

Match the following items. 1. high-intensity bundle of energy being emitted from some decaying nuclei gamma ray 2. particle radiating from the nucleus of some atoms beta particle 3. negative particle identical to an electron but radiating from a decaying nucleus alpha particle

Drive down any three characteristic of modern periodic table