Which electron configuration represents the electrons of an atom in an excited state? A) 2-6 B) 2-5-1 C) 2-5 D) 2-8-5

How will the emission of an alpha particle affect the atomic number of an atom

Match the name of the following compound:   mgso4  · h2omagnesium sulfate monohydratemagnesium (ii) sulfate monohydratemagnesium (ii) sulfate hydratemagnesium sulfate hydrate

What is the percentage composition of carbon in the compound ch4