Chemical,when you light a match stick, you are starting a chain reaction of the substance chemical formula, making it a chemical change
Physical change because ther is force which is the electric current
Change in temperature affects the rate of reaction since it causes a change in the number of collisions per unit time. These collisions cause the breaking of bonds and formation of new ones giving out new products. An increase in temperature increases the rate of collisions hence increasing the rate of reaction while a decrease in temperature leads to a decrease in the rate of reaction due to the decreased number of collisions per unit time. thus the correct choice for blank A is: B. the number of collisions between molecules and for blank B: decrease.
Answer:
2 elements magnesium(Mg) and chlorine (Cl)
