Which of the following element combinations will likely form polyatomic ions? cesium and chlorine oxygen and carbon sodium and bromine xenon and neon

Which statement best describes the he properties of iconic compounds ?

Which statement characterizes synthetic polymers? a. they come from animals and plants. b. they are found in nature. c. they are made in a lab. d. they are components of starch.

Jenny wants to test the electrical conductivity of two substances dissolved in water. she is preparing the containers for the experiment. which factor is most important for her to control?