Sulfur has an atomic number of 16. what would be the valence number of this element?

Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3

This image is an example of a(n) a) atom. b) compound. c) mixture. d) molecule.

Which theory was contradicted by experiments with the photoelectric effect? light spreads out after it passes through a small opening. as soon as light strikes metal, electrons will be ejected. visible light, regardless of color, will cause the ejection of electrons when striking metal. the kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.