Which statement best explains why calcium has a larger atomic radius than magnesium? A.
Calcium has a stronger nuclear charge than magnesium.
B.
Calcium has electrons in more energy levels than magnesium.
C.
Calcium has more neutrons than magnesium.
D.
Calcium’s third energy level contains more electrons than magnesium’s.

Calcium has electrons in more energy levels than magnesium.

Explanation:

Correct on Edmentum (Plato)

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.

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.