Answer:
![[Ar] 3d^{2} 4s^{2}](https://tex.z-dn.net/?f=%5BAr%5D%203d%5E%7B2%7D%204s%5E%7B2%7D)
Explanation:
You can look at the periodic table and figure out the electron config.
Answer:
The correct option is: provide a source of counterions to prevent the build-up of charge at both the cathode to the anode.
Explanation:
A salt bridge is a U-shaped glass tube that is used in a voltaic cell or galvanic cell to connect the oxidation and reduction half-cells and complete the electric circuit.
<em>It allows the ions to pass through it, thus preventing the accumulation of charge on the anode and cathode as the chemical reaction proceeds.</em>
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Therefore, the correct option is: <u>provide a source of counterions to prevent the build-up of charge at both the cathode to the anode.</u>
Answer:
C
Explanation:
The reason why C is true is because this species of plant requires certain things to survive, and without said requirements they will die. Hence, the animal that is unable to compete will die and be eliminated from the ecosystem. Hope that helps!
Answer:
D. You can no longer tell if your original sample contained Na+ or K+.
Explanation:
Group reagents are the reagents which are used to separate a whole group of cations from the other groups of cations.
For example, for group 1 , the group reagent is HCl and for group 5, the group reagent is ammonium carbonate.
<u>When sodium chloride and potassium carbonate is used, it means we are contaminating our sample with foreign cations which may interfere in the process of detection. Also, we will not be able to decipher whether the sample has these ions in the initial or not as we have added them.</u>
