Can someone give me fr/ee points please :(

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

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.

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?