Which half-reaction correctly represents reduction? OA) Ca2+ - Ca + 2e-

OB) Ca2+ + 2e-

Ca

O C)2 F- + 2e- - F2

OD) 2F- - F2 + 2e-

B. Ca2+   +  2e- >   Ca

Explanation:

Reduction involves the gaining of electrons as well as a decrease in the oxidation state of the atom or ion.

In this case; Ca2+ gains two electrons and the oxidation state is reduced from +2 to  0.

Ca2+   +  2e- >   Ca

the movement of aircraft through clouds can even cause lightning strikes. a single lightning event is a "flash", which is a complex, multi-stage explosively ejected.

explanation:

and the person below goggled it.

mark as brainliest

the answer is 1260

you spend 7 hours in school for 1 school day with 5 school days in 1 school week with 36 school weeks in a school year.

7*5*36= 1260 it's all about multiplying