Theo thuyết liên kết hóa trị VB (Valence Bond), liên kết N−H trong phân tử NH3 đượchình thành do sự xen phủ giữa các orbital: *

The tilt of the earth's axis of rotation is responsible for the a) ocean's tides. b) size of the moon. c) brightness of stars. d) earth’s seasons.

Me i dont know what to do! the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?