Yellow ball=hydrogen atomBlack ball=carbon atom
Wood stick=polar covalent bond
Spring=covalent bond
Ethyne is shown above and Ethyne above has formula of HC2H. Ethyne molecule has a 180 degree bond angle where atoms that are alike to each are positioned as far apart as possible. Thus, it seems that ethyne has a linear structure since atoms are positioned in one line. Each hydrogen atoms are single bonded to carbon atom to follow duet rule while carbon atom are triple bonded to another its atom to satisfy its octet rule.
