Defin steric effect, resonance effect and medium effect? give at least 3 example for each?

Pls i will do pls imma diewhat forms white light? (4 points)a. combination of all wavelengths of ultraviolet light b. combination of all wavelengths of visible lightc. absorption of electromagnetic waves d. absorption of infrared rays

Which of the following isotopes has the same number of neutrons as phosphorus-31?

All chemical reactions use reactants in a specific proportion or stoichiometry to form products. the reactant regulates the amount of products produced. a) excess b) limiting c) proportional d) stoichiometric