Which of the following has three electrons in its valence shell?

What is the internal energy of 4.00 mol of diatomic nitrogen gas n2 at 455k

Four point charges each having charge q are located at the corners of a square having sides of length a. find symbolic expressions for the following. (a) the total electric potential at the center of the square due to the four charges (use any variable or symbol stated above along with the following as necessary: ke.) vtotal= (b) the work required to bring a fifth charge p from infinity to the center of the square (use any variable or symbol stated above along with the following as necessary: w=

An object dropped from cliff falls with a constant acceleration of 10 metre per second square find its speed of two seconds after it was dropped