The carbon atom is tetravalent; this means that answer the bond angle between each bond is 90°, forming an arrangement like the points on a compass carbon readily forms ionic bonds a carbon atom can complete its valence shell by forming four covalent bonds carbon has a total of four electrons carbon's first electron shell holds four electrons i don't know yet

The correct option is: A carbon atom can complete its valence shell by forming four covalent bonds

Explanation:

Carbon is a chemical element that belongs to the group 14 of the periodic table. The atomic number of carbon atom is 6 and it is denoted by the chemical symbol C.

The electronic configuration of carbon is: 1s², 2s², 2p².  

Therefore, there are 2 electrons in the first electronic shell and 4 electrons in the second electronic shell of the carbon atom.  

There are four valence electrons in a carbon atom and thus it can form four covalent bonds to complete its valence shell. Therefore, carbon atom is tetravalent.