Define valency . Calculate the for the elements having atomic number. 2,4,7,10,15​

Fission of uranium-235 products energy and a. isotopes of smaller elements b. isotopes of larger elements c. lighter isotopes of uranium d. heavier isotopes of uranium

Predict whether the changes in enthalpy, entropy, and free energy will be positive or negative for the boiling of water, and explain your predictions. how does temperature affect the spontaneity of this process?

Which symbol can be used to indicate the pressure at which a chemical reaction is carried out? 25°c 2 atm pa