An aluminium atom has a mass number of 27 and a proton number of 13. How many neutrons does this aluminium atom contain?

What forms when chemical reactions combine pollution with sunlight?

An object becomes electrically charged when: electrons are created in it electrons from it are destroyed electrons are transferred to it protons from it are destroyed protons are created in it

Select the correct answer. wax is a nonpolar substance. in which type of substance is it most soluble?