A covalent bond is a chemical bond in which atoms share what?

Electrons

Explanation:

Electrons from the outershell so both of the atoms have a stable outer shell

Glucose, also called grape sugar, blood sugar or corn sugar, is among the simplest and one of the primary naturally occurring sugars. produced naturally by plants as the primary photosynthesis product, it is heavily used by living beings as a main energy source and is necessary for cellular respiration. chemically, it is a monosaccharide carbohydrate and serves as a building block for complex sugars like starch.