Answer: K only has 1 valence electron. It will leave with only a little effort, leaving behind a positively charged K^+1 atom.
Explanation: A neutral potassium atom has 19 total electrons. But only 1 of them is in potassium's valence shell. Valence shell means the outermost s and p orbitals. Potasium's electron configuration is 1s^2 2s^2 2p^6 3s^2 3p^6 4s^1. The 4s orbital is the only orbital in the 4th energy level. So it has a valency of 1. This means this electron will be the most likely to leave, since it is the lone electron in the oyutermost energy level (4). When that electron leaves, the charge on the atom go up by 1. The atom now has a full valence shell of 3s^2 3p^6, the same as argon, Ar.
(2) a decrease in activation energy and an increase in the reaction rate
(3) an increase in activation energy and a decrease in the reaction rate
(4) an increase in activation energy
Answer: Option (2) is the correct answer.
Explanation:
Activation energy is the minimum amount of energy required to start or initiate a chemical reaction.
Whereas a catalyst helps in increasing the energy of reactant molecules so that they can overcome activation energy barrier and actively participate in the reaction.
Hence, adding a catalyst to a chemical reaction results in a decrease in activation energy and an increase in the reaction rate.
Adding a catalyst to a chemical reaction results in a decrease in activation energy and an increase in the reaction rate, as catalysts speed up chemical reactions by lowering the required activation energy. The correct answer to the given question is option (2) a decrease in activation energy and an increase in the reaction rate
In the world of Chemistry, a catalyst is a substance that increases the speed of a chemical reaction without itself undergoing any permanent chemical change. It achieves this acceleration by lowering the activation energy required for the reaction to occur. Therefore, adding a catalyst to a chemical reaction results in a decrease in activation energy and an increase in the reaction rate (option 2).
The activation energy is the minimum amount o f energy required for a chemical reaction to proceed. By lowering this energy barrier, a catalyst allows the reaction to proceed more quickly, in other words, it increases the rate of the reaction.
The correct answer to the given question is option (2) a decrease in activation energy and an increase in the reaction rate
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The statement “Aconcentrated solution contains a large proportion of solute relative to thesolvent.” is true. It means that the amount of solute molecules present in thatsolution is greater than the amount of solvent molecules present in thatsolution.