What is the difference between a mixture, a solution, and a pure substance?

Afamily is one another name for a group on the table of elements.

100 points answer quick the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

Express the following number in scientific notation. 0.026890 =