How does an atom of tellerium become an ion.

 Element Tellurium (Te), Group 16, Atomic Number 52, p-block, Mass 127.60. ... defined as being the charge that an atom would have if all bonds were ionic.

What ion does tellurium form?

Te+4

Tellurium, ion (Te4+) | Te+4 - PubChem.

Explanation:  Tellurium is a chemical element with the symbol Te and atomic number 52. It is a brittle, mildly toxic, rare, silver-white metalloid.

Tellurium

Tellurium Element - Visual Elements Periodic Table

Discovery date1783  

Discovered byFranz-Joseph Müller von Reichenstein  

Origin of the nameThe name is derived from the Latin 'tellus', meaning Earth.  

Allotropes  

Te

Tellurium

52127.60  

Fact box

Group16  Melting point449.51°C, 841.12°F, 722.66 K  

Period5  Boiling point988°C, 1810°F, 1261 K  

Blockp  Density (g cm−3)6.232  

Atomic number52  Relative atomic mass127.60  

State at 20°CSolid  Key isotopes130Te  

Electron configuration[Kr] 4d105s25p4  CAS number13494-80-9  

ChemSpider ID4885717ChemSpider is a free chemical structure database

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.

if it's not useful, feel free to report for mistake in answer.