Answer:
Ligands
Explanation:
Ligands are small molecules that transmit signals in between or within cells. Ligands exert their effects by binding to cellular proteins called receptors.
The correct answer is the second option. These deposits are a result of solutes becoming un-dissolved from a solution. These solutes are from the water or liquid that you are boiling in the kettle. As you boil a liquid mixture, it is possible that some of the solutes would precipitate because the solubility of such solute is lowered due to the increase in the temperature. Most solubility of solid solutes are related to temperature inversely. So, as the temperature increases, the solubility would decrease. Solubility is the amount of a solute that can be completely dissolved in a certain amount of solvent.
Answer:
when they form a bond, Atom B has higher electronegativity than atom A.
Explanation:
Electronegativity is the tendency of an atom in a bond pair to attract the shared pair of electron towards itself.
Covalent bond is the bond which is formed with the sharing of the electrons between the two atoms which are taking part in the bond. It is generally formed between the atoms with similar electronegativity values.
It is the bond which is generally occurs within non metals as they share electrons to complete their octet.
The difference in the electronegativity values of the atoms involving in a covalent bond must not exceed the value of 1.7 .
The electrons in case of atom B are close to the nucleus and in case of atom N are far from the nucleus. Thus, when they form a bond, Atom B has higher electronegativity than atom A.