1. The protons in the nucleus attract electrons. True or False

2. Neutrons have a positive charge.
True or False

3. Scientists have discovered over two hundred elements.
True or False

4. An element is composed of at least two kinds of atoms.
True or False

C3h8o3 - glycerol major species present when dissolved in water

In the millikan oil drop experiment they determined that every drop had a charge which was a while number multiple of -1.60x10^-19. if a drop has a total charge of -9.60x10^-19 then how many excess electrons are contained within the drop?

The picture represents the process that produces most of the energy used by living organisms on earth. which process is represented in the picture? a) the magnetic attraction between two hydrogen nuclei. b) the fusion of hydrogen nuclei to produce a helium nucleus in the core of the sun. c) the fission of hydrogen nuclei to produce a helium nucleus in the core of the sun. d) the chemical reaction between hydrogen nuclei to produce a helium nucleus in earth's atmosphere.