I have a sample of 2.23x1024 atoms of pure water, H2O. What volume in mL does this sample occupy? The density of water is 1.00g/cm3?

Write the chemical symbols for three different atoms or atomic cations with 27 electrons. asap!

Which statement best describes the oxidation numbers of the atoms found in magnesium chloride? a. magnesium has a 2- oxidation number and chlorine has a 1+ oxidation number. b. magnesium has a 2- oxidation number and chlorine has a 2+ oxidation number. c. magnesium has a 2+ oxidation number and chlorine has a 1- oxidation number. d. magnesium has a 1+ oxidation number and chlorine has a 1- oxidation number.

Which other elements contain the same number of outer electrons as sodium