What are the half-reactions for a galvanic cell with Zn and Mg electrodes?
A. Zn(s) → Zn2+(aq) + 2e and Mg(s) → Mg2+(aq) + 2e
B. Zn(s) → Zn2+(aq) + 2e and Mg2+(aq) + 2e Mg(s)
O C. Zn2+(aq) + 2e → Zn(s) and Mg2+(aq) + 2e → Mg(s)
D. Zn2+ (aq) + 2e → Zn(s) and Mg(s) → Mg2+(aq) + 2e

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

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