Naturally occurring, inorganic, crystalline structure is a mineral
2.a)R b)R c)L d)L e)R f)L g)L
Subsoil is the layer of soil under the topsoil on the surface of the ground.
The exothermic process is a process or reaction that involves a release of energy from the system to its surroundings in various forms usually through heat, light, electricity or sound. In the four given choices, when melting a copper, you try to immerse the metal in heaping coals of fire. The metal will absorb the thermal energy coming from the coal, thus, once you retrieve the metal back, light will be emitted from it as well as heat.
Therefore, the answer is B. MELTING OF COPPER
The answer is 4.69 x 10⁻¹⁹ I hope this helped!
