Compared to lead-208, what does the nuclide bismuth-208 have more of?
a. protons
b. neutrons
c. energy levels
d. bonding configurations

Bismuth will have more of protons.

Explanation:

Atomic number of an element is equal to number of protons.

The atomic number of lead = 82, so the number of protons = 82

The atomic number of bismuth = 83, so the number of protons =83

The mass number = number of protons + number of neutrons

As given that mass number of each of the elements is same.

As the number of protons of bismuth is more than leas, the number of neutrons in bismuth will be less than lead.

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.