Question

which is the element that doesn't have sigma bond?​

Answer 1

Answer:

Sigma and Pi Bonds. The hybridization model helps explain molecules with double or triple bonds (see figure below). Ethene (C2H4) contains a double covalent bond between the two carbon atoms and single bonds between the carbon atoms and the hydrogen atoms. The entire molecule is planar.

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Answer 2

Answer:

bro I can't give you example

Explanation:

A molecule with no rings can be represented as a tree with a number of bonds equal to the number of atoms minus one (as in dihydrogen, H2, with only one sigma bond, or ammonia, NH3, with 3 sigma bonds). There is no more than 1 sigma bond between any two atoms.