Which of the following is true about two neutral atoms of the element gold? the nucleus is missing in both. each has a different mass. both have the same properties. each has a different number of electrons.

Option (c) is the correct answer.

Explanation:

Each element is made up of same type of atoms which cannot be further divided into simpler substances.

For example, a piece of zinc metal will only contains atoms of zinc and no other element.

Since, these atoms are the same as the element itself. Hence, the element still retain its properties because there no other different element is present in it.

Thus, we can conclude that the statement both have the same properties, is true about two neutral atoms of the element gold.

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.

it is stable as it is in group 0 which have full outer shells of electrons