An atom's lewis dot structure has four dots. which of the following elements could it be, and why? aluminum, because it is a metal with four electrons in period 3. beryllium, because it is in period 2 and has four total electrons. carbon, because it is in group 14 and has four valence electrons. calcium, because it is an alkaline earth metal in period 4.

Explain the effects of nh3 and hcl on the cuso4 solution in terms of le chatelier's principle

Which explanation is true about what happens to a ray of light when it strikes a mirror? a. a light ray is transmitted toward a mirror at a certain angle. the light ray is then reflected by the mirror at an equal angle but in the opposite direction of the transmitted ray. b. an incident ray strikes a mirror at an angle with a line perpendicular to the mirror. the light ray is then reflected at an angle equal to the angle of incidence but on the opposite side of the perpendicular line. c. a reflecting ray strikes a mirror at an angle with a line perpendicular to the mirror. the light ray is then refracted at an angle equal to the angle of the reflecting ray and on the same side of the perpendicular line. d. an incident ray strikes a mirror at an angle with a line parallel to the mirror. the light ray is then transmitted at an angle equal to the angle of incidence but on the opposite side of the parallel line. you so much! : -d take the time to try and answer correctly.

Which of these is a physical property