Answer:
In the given voltaic cell, the reaction occurring at cathode :
![Cu(OH)_2(aq)+2e^-\rightarrow Cu(s)+2OH^-(aq)](https://tex.z-dn.net/?f=Cu%28OH%29_2%28aq%29%2B2e%5E-%5Crightarrow%20Cu%28s%29%2B2OH%5E-%28aq%29)
Explanation:
A voltaic cell is an electro-chemical cell which converts chemical energy into electrical energy. It has two electrodes :
- Anode : Where oxidation occurs , that is loosing of electrons.
![M\rightarrow M^{n+}+ne^-](https://tex.z-dn.net/?f=M%5Crightarrow%20M%5E%7Bn%2B%7D%2Bne%5E-)
- Cathode : Where reduction occurs, that is gaining of electrons.
![M^{n+}+ne^-\rightarrow M](https://tex.z-dn.net/?f=M%5E%7Bn%2B%7D%2Bne%5E-%5Crightarrow%20M)
In the given voltaic cell, the reaction occurring at anode:
![Zn(s)+2OH^-(aq)\rightarrow Zn(OH)_2(aq)+2 e^-](https://tex.z-dn.net/?f=Zn%28s%29%2B2OH%5E-%28aq%29%5Crightarrow%20Zn%28OH%29_2%28aq%29%2B2%20e%5E-)
In the given voltaic cell, the reaction occurring at cathode :
![Cu(OH)_2(aq)+2e^-\rightarrow Cu(s)+2OH^-(aq)](https://tex.z-dn.net/?f=Cu%28OH%29_2%28aq%29%2B2e%5E-%5Crightarrow%20Cu%28s%29%2B2OH%5E-%28aq%29)
<span>Chemical reactivity of all of the different elements in the periodic table depends on the number of electrons in that last, outermost level, called the valence level or valence shell. In the case of gold, there is only </span>one valence electron<span> in its valence level. Hope I helped! :)</span>
Answer:
D
Explanation:
Because the number of protons is the same as the atomic number, we know what the number of protons has to be 26. The mass number, 55, is the same as the number of protons plus neutrons. Lastly, because there is no charge on this atom, the number of electrons would have to be the same as the number of protons, which is 26.
Are there any answer choices?