What are covalent bonds?
Covalent bonds are a type of chemical bond formed by a shared pair of electrons between atoms.
Covalent bonds tend to occur between non-metal type atoms (metals tend to form ionic bonds which are formed by a transfer of electrons from one atom to the other rather than a sharing of them).
There are single covalent bonds- each atom contributes one electron to the shared pair.
There are also multiple covalent bonds- each atom contributes more than one electron to form 2 or sometimes 3 pairs of electrons.
AS
Related Chemistry A Level answers
All answers ▸Using your knowledge of periodicity and atomic structure, why does the first ionisation energy decrease moving down a group yet increase moving along a period in the periodic table?
How would you determine the pH of a solution?
The standard enthalpy of formation of glucose is -1273.3kJ/mol, and for carbon dioxide it is -393.5kJ/mol, and for water -285.8 kJ/mol. What is the standard enthalpy of combustion of glucose, C6H12O6?
The shape around the oxygen atom in butan-2-ol is non linear. Predict the shape and angle of the C-O-H bond giving explanations