Explain the Variation in radius of M3+ ion in group A
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a. a primary source combines several different accounts of an event. b. a primary source generally benefits from having been written after an event.

explanation:

pure water does not conduct electricity very well. however, when certain substances are dissolved in water, the solution does conduct electricity. you can make a simple device that shows how well a solution conducts electricity. this device uses a flashlight bulb to indicate how well the solution conducts electricity. the better the solution conducts electricity, the brighter the bulb will glow.

explanation:

i believe it is 40–40–20%

explanation: