Covalent Bonds

covalent bond

A chemical bond that involves sharing a pair of electrons between atoms in a molecule

molecular compound

A chemical compound whose simplest units are molecules

triple bond

A chemical bond formed when atoms share three pairs of electrons

molecule

(physics and chemistry) the simplest structural unit of an element or compound

A carbon atom can form four covalent bonds. How many valence electrons does it have?

4 covalent bonds, especially with Hydrogen, Oxygen, and Nitrogen. This allows it to build large and diverse compounds.

double bond

A covalent bond in which two pairs of electrons are shared between two atoms

what is a double bond? Use Figure 16 to explain how a carbon dioxide molecule has a stable set of eight valence electrons for each atom?

A double covalent bond' the sharing of two pairs of valence electrons by two atoms. So when two oxygens combined with a carbon it creates a double bond making a stable set of eight valence electrons.

polar bond

a covalent bond in which electrons are not shared equally

nonpolar bond

a covalent bond in which the bonding electrons are shared equally by the bonded atoms, resulting in a balanced distribution of electrical charge

why are most molecular compounds poor conductors

because they do not have charged particles to carry a current

Both carbon dioxide molecules and water molecules have polar bonds. why then is carbon dioxide a nonpolar molecule while water is a polar molecule?

carbon dioxide is non polar because its straight-line shape causes the two oxygen atoms to pull on the shared electrons in opposite directions and cancel each other out

What is the attraction that holds two covalently bonded atoms together?

covalent bond

How are the properties of molecular compounds different from those of ionic compounds?

molecular compounds has simplest units elements together and ionic compounds are compounds containing charged particles called ionic compounds.

predict whether carbon dioxide or water would have a higher boiling point. explain your prediction in terms of the attractions between molecules

water would have a higher boiling point because the attraction between its polar molecules requires more energy to overcome

how do some atoms in covalent bonds become slightly negative or slightly positive? what type of covalent bonds do these atoms form?

when they pull more or less strongly on shared electrons. The Valence electrons will lose or gain electrons.