Which two terms relate and why? atom, amu, element

Atoms and element do relate with each other.

Atoms are defined as the smallest particle of an element which cannot be divided further keeping its physical and chemical properties intact, and they take part in a chemical reaction.

Elements are defined as the substances that are components of matter and cannot be further divided into simpler substances.

AMU or the Atomic mass unit is defined as a unit that is used to express atomic mass and is equal to mass of a hydrogen ion.

Elements are actually formed of atoms that are present in nature and atoms do form elements and even compounds. So they are inter related with each other.

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.