Because silicon is a metalloid/semi-metal and carbon is a nonmetal, the bond is covalent.
It makes a covalent bond. This means a bond between a metal and non-metal element.
One atom that can form a bond with silicon is oxygen, to form silicon dioxide, SiO2.
Carbon is versatile because it can form single, double, and triple bonds. It can also form chains, branched chains, and rings. Also, carbon atoms bond fairly readily with other carbon atoms. It's much more energetically favorable for, say, a silicon atom to bond with an oxygen atom than another silicon atom; with carbon, the difference is less, so carbon-carbon bonds are more stable in the presense of oxygen than silicon-silicon bonds are... this is important, given that oxygen is the third most common element in the universe.
Carbon is in Group V. Thus, it needs 4 more electrons so as to achieve the octet structure in its valence shell. As such, carbon has make at most 4 single covalent bonds. The least number of covalent bonds carbon can make is 2 double bonds. We do not see an example of carbon forming 1 covalent bond involving the sharing of all 4 of its valence electrons.
Ionic bond
covalent bond
It makes a covalent bond. This means a bond between a metal and non-metal element.
it bonds with oyxgen to make sand
One atom that can form a bond with silicon is oxygen, to form silicon dioxide, SiO2.
A covalent bond
If you're looking for a replacement for carbon in the phrase "carbon-based lifeform" ... there really isn't one. Science fiction sometimes talks about silicon-based lifeforms, but they're not very likely for thermodynamics reasons (silicon would much, much rather bond with oxygen than with another silicon atom, and when that happens you get quartz, not complex molecules capable of supporting life).
C-C is a single-bond carbon C=C is a double-bond carbon... soooo.. if you need a triple-bond carbon make the hyphen thrice..
silicon has 14 valence electrons, and therefore can form 14 covalent bonds. carbon is a main biological element (all living things are made of carbon-based compounds), silicon could be a candidate as a central biological element too because of the amount of electrons it has, would allow it to bond with many different elemements
A covalent bond
Carbon is versatile because it can form single, double, and triple bonds. It can also form chains, branched chains, and rings. Also, carbon atoms bond fairly readily with other carbon atoms. It's much more energetically favorable for, say, a silicon atom to bond with an oxygen atom than another silicon atom; with carbon, the difference is less, so carbon-carbon bonds are more stable in the presense of oxygen than silicon-silicon bonds are... this is important, given that oxygen is the third most common element in the universe.
Silicon is obtained by heating silica, or silicon dioxide with carbon or magnesium (or some reducing agent) in an electric furnace. And after that this mixture is coated on the object to make it water proof.
Si has four valence electrons so silicon need to make four covalent bond.