How many significant figures are in the following number? 5.67 x 10^6

Strong conductivity of plasma allows it to act and react as and

What will most likely happen when two bromine atoms bond together?

The chemical equation below shows the reaction of sodium (na) and chlorine (cl) to form sodium chloride (nacl). 2na + cl2 → 2nacl in this equation, which of the following is a reactant? i. sodium ii. chlorine iii. sodium chloride