calCULATE THE APPROXIMATE VOLUME OF WATER THAT MUST BE ADDED TO 250ML OF 1.25N SOLUTION TO MAKE IT 0.500N?

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