magnesium and calcium are in the same group on the periodic table. which sentence best explains why they have similar properties?

Water ionizes by the equation h2o(l)⇌h+(aq)+oh−(aq) the extent of the reaction is small in pure water and dilute aqueous solutions. this reaction creates the following relationship between [h+] and [oh−]: kw=[h+][oh−] keep in mind that, like all equilibrium constants, the value of kw changes with temperature.

An empty fuel tank can still contain and therefore can be even more dangerous than one full of liquid fuel.

Express the following number in scientific notation. 0.026890 =