-In glucose each carbon has 4 bonds, each hydrogen has one, and each oxygen has 2 bonds.
Explanation;
-A molecule of glucose has three different elements which are; carbon, oxygen and hydrogen, each molecule is formed by six carbon atoms, 12 hydrogen atoms and six hydrogen atoms .
-Each carbon has four valence electrons and thus forms four bonds while hydrogen has one valence electrons thus forms one bond, and oxygen being a non metal requires to gain two electrons to achieve octet thus forms two bonds.
There is a limited amount of atoms to be attached to each molecule (this acts as a guide): each C (Carbon) has 4 bonds, each H (Hydrogen) 1, each O (Oxygen) 2.