Number of Protons
Number of
Neutrons
Atomic
Number
Mass
Number
Element
(symbol)
A
7
B
15
С
D
E
26
56
Using the periodic table, complete the table to describe each atom. Type in your answers,
A
B
С
D

dynamic equilibrium is the answer.

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.