Pls help me im in k12 7th grade and I need help with this teacher graded assignment

Electrons are extremely important to what area of technology? a) anti-aging research b) household product development c) electronics d) drug discovery

If i add water to oil what will happen

Select all of the statements which are true. electrons are located in shells or orbits around the atom. electrons orbit slowly around the atom. electrons travel in one flat path around the nucleus of an atom. the valence of an atom is determined by the number of electrons in the atom's outermost shell.