Calcium oxide Guard tube Dry chloride gas Iron Heat Combustioon juhe Iran (III) chloride. Explain why it is necessary to pass chlorine gas through the apparatus before heating begins​

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

The reaction q+r2=r2q is found to be first order in r2 and

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.