Which statement accurately compares the trends in atomic number and atomic mass in the periodic table? a. the atomic number increases from left to right, while the atomic mass increases from right to left. b. the atomic mass increases from left to right, while the atomic number increases from right to left. c. both the atomic mass and the atomic number increase from left to right. d. both the atomic mass and the atomic number increase from right to left.

The answer is , C. Both the atomic mass and the atomic number increase from left to right .

C. Both the atomic mass and the atomic number increase from left to right.

Explanation:

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.