A magnesium atom that loses 2 electrons becomes a A) Positive ion with a smaller radius

B) Positive ion with a larger radius

C) Negative ion with a larger radius

D) Negative ion with a smaller radius

In 1901, thomas edison invented the nickel-iron battery. the following reaction takes place in the battery. fe(s) + 2 nio(oh)(s) + 2 h2o(l) fe(oh)2(s) + 2 ni(oh)2(aq) how many mole of fe(oh)2, is produced when 5.35 mol fe and 7.65 mol nio(oh) react?

Ineed ! i have no clue how to do this problem.

Helium decays to form lithium. which equation correctly describes this decay?