Problem page write a balanced half-reaction for the reduction of solid manganese dioxide mno2 to manganese ion mn 2 in acidic aqueous solution. be sure to add physical state symbols where appropriate.

In a reduction reaction, some electrons are gained by the substance being reduced. The balanced half-reaction to this would be:

MnO2(s)  +  4 H+ (aq)  +  2e ---> Mn^2+ (aq)  +  2 H2O (aq)

It is called balanced reaction since the number of each element in the left side is equal to the number of each element on the right side.

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.

the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).