In the excited state, a possible electron configuration of aluminum, 13Al is 1) 1s2 2s2 2p6 3s2 3p4
2)1s2 2s2 2p2
3)1s2 2s2 2p6 3s3 3p4
4)1s2 2s2 2p6 3s2
4)1s2 2s2 2p6 3s1

This large tectonic plate is bounded on three sides by whats know as the ring of fire. what is the name of this tectonic plate? a) pacific plate b) eurasian plate c) north american plate d) indo- australian plate plz it's science but there's no option for science so i picked chemistry

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?

Which of the following has wavelength longer than the wavelength of viable light? a) x rays b) gamma rays c) radios waves d) ultraviolet waves