1. Given the electron configuration of 1s 2s 2p, how many electrons does this element have in its outer level?

i don't see a text, but i am gonna assume this *orbit* the curved path, usually elliptical, described by a planet, satellite, spaceship, etc., around a celestial body, as the sun.

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).