What is the half-life of the fictitious radioisotope"pennium"?

The rules of engagement (roe) working group is often used to (select all that apply.)

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?

How can one make a supersaturated solution? (apex)