Answer:
Ca2+ represents an ion with 20 protons and 18 electrons.
Explanation:
Answer:
Sodium and chloride ions separate when salts are dissolved in water. The dissolved sodium and chloride ions, in high concentrations, can displace other mineral nutrients in the soil. Plants then absorb the chlorine and sodium instead of needed plant nutrients such as potassium and phosphorus, leading to deficiencies.
Explanation:
the explanation is given inyour answer.
Answer : Option C) The C that's in C=O.
Explanation : In the given molecule of 
the ball and stick model gives an idea about the bonds arranged in this molecule. With the given information it is easy to identify that Carbon and Oxygen atoms in the double bond CO will have strongest partial positive charges.
As the bond is that is first oxygen is attached to carbon by double bond and another oxygen is attached by single bond. So, when carbon is attached with oxygen which is more electronegative pulls the electron cloud towards itself and gives carbon a partial positive charge.
