The central nitrogen atom in the no2- ion has nonbonded electron pairs and bonded electron pairs in its valence shell.

1 pair of nonbonded electrons

3 pairs of bonded electrons

Explanation:

N has 5 electrons in its valence shell while O has 6.

Lewis structure of NO²⁻ is in the image.

N is in the middle of the structure because is the less electronegative atom. 3 electrons of this atom are forming the bonds and 2 electrons are nonbonded.

As you can see, N has 3 pairs of electrons forming 3 bonds with Oxygens and there is 1 pair of nonbonded electrons.

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

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water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.