Their electrons must be the same. Afterall, if the bond is covalent, the electron must be shared equally. This can only happen is the atoms tug on the electrons with the same strength. Since the strength is determined by electronegativity, then the electronegativities must be the same.
Answer:
The highly unstable pure sodium or potassium wants to lose an electron and this splits the water atom, producing a negatively charged hydroxide ion and hydrogen and forming an explosive gas that ignites.
Explanation:
convection is the transfer of heat through the air