Which distinguishes chemical changes from physical changes? A. Physical changes are permanent, while changes are temporary.

B. Chemical changes produce new substances, while physical changes do not.

C. Physical changes alter the substance, while chemical changes maintain the same the same properties.

D. Chemical changes result in a change in mass, while physical changes do not.

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.

girl imma just put my comment here because i need a couple point okurrttt

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.