Asample composed only of atoms having the same atomic number is classified as 1. a compound 2. a solution 3. an element 4. an isomer

Me i dont know what to do! 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.

Match the mixture with the substance// i really need on this guys (it’s a pic btw)

What mass of glucose is produced when 54g of water react with carbon dioxide