How many single covalent bonds must a silicon atom form to have a complete octet in its valence shell? how many single covalent bonds must a silicon atom form to have a complete octet in its valence shell? 0 3 1 2 4?

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

In salt water solution,the salt is the blank

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.