Name two properties of electrons that indicate a wave-like nature

The two properties that indicate wave-like nature of an electron is its motion and electrons diffraction and interference in a beam.

Explanation:

The term diffraction refers to when a light from a point source hits an obstacle then the waves are spherical and forms a fringed image pattern.

Whereas interference refers to when two or more wave trains move on intersecting or coincident paths, then their net effect is called interference.

Therefore, it can be concluded that the two properties that indicate wave-like nature of an electron is its motion and electrons diffraction and interference in a beam.

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."

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.