Based on its location in the periodic table, what can most likely be predicted about sulfur? It has four valence electrons available for bonding. It has four nonbonding electrons. It has six valence electrons available for bonding. It has six nonbonding electrons.

What is the force of attraction between the particles in a salt crystal

Achange in the number of neutrons in an atom will change an blank . when the number of protons changes in an atom, a new element will form.

The scheme below is from a series of reactions that are part of a synthesis of vitamin a. answer the following questions with reference to this scheme. (i) what is "reagent a"? (ii) draw a step-by-step mechanism which explains the formation of compound c from compound b (iii) which reagents would you use to form compound e from compounds c and d (reagents b and c)? for each reagent suggested above in (ii) explain the role of the reagent in the reaction to (iv) form compound e. you may wish to do this by drawing a mechanism. 1. addition of reagent a но reagent a 2. н, о" thо oh нон-с compound a. compound b. compound c .ch-оh 1. reagent b "сно 2. reagent c сh oh compound e. compound d.