How many additional electrons does this atom of oxygen need in its valence shell to satisfy the octet rule?

What is the fate of the electrons that interact with a specimen in an electron microscope?

The slope of a velocity time graph over any interval of time gives the during that interval

Awoman holds a book by placing it between her hands such that she presses at right angles to the front and back covers. the book has a mass of m = 1.8 kg and the coefficient of static friction between her hand and the book is μs = 0.67. no attempt 50% part (a) what is the weight of the book, fgb in newtons?