Answer:
The sharing of electrons between a water molecule that forms four hydrogen bonds with the other four water molecules:
Explanation:
The hydrogen bond is a weak electrostatic force of attraction that exists between a covalently bonded H-atom and a highly electronegative atom like N,O or F.
In the case of the water molecule,
the highly electronegative atom is Oxygen and the intermolecular hydrogen bond in water is as shown below:
Thus H-bond is a weak electrostatic attraction formed between H-atom and O-atom in water.
Answer:
C. The number of electrons in the valence shell
Explanation:
When the valence shells are complete, the atom is unreactive. However, when they are incomplete, they are chemically reactive.
Pretty sure it would be "B" because there is no communication involved just simply the white cells producing antibodies.