What 2 elements are in the same group? Sodium and Calcium
Fluorine and Neon
Chlorine and Bromine
Carbon and Aluminum

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

If you chip a tooth, most likely you will go to the dentist to have the missing material filled in. currently the material used to fill in teeth is a polymer that is flexible when put in, yet is hardened to the strength of a tooth after irradiation with blue light at a wavelength of 461 nm. what is the energy in joules for a photon of light at this wavelength?

Fossil fuels are organic compounds that are made from