Calculate the number of molecules remaining in an electronic vacuum tube of capacity 180 cm3 which has been evacuated and sealed off at 25 oc to a pressure of 1. 0 * 10-7 mmhg.

n has four pairs of electrons in the valence shell, electrons repel one another ,n has 7 protons in its nucleus, and since n has 7 protons, it must fill the second shell, giving it 4 pairs of electrons. the electrons form 3 bonds and 1 lone pair of electrons. each pair of electrons repels the other pairs, so they are equally far apart.

so all of the above

the answer is 1 i believe

може ли да зареждате повече информация, моля