Biology ch #2.2

two atoms attain stability by sharing electrons

attraction of 2 atoms, linking them together

-2 types (covalent and ionic)

A substance made up of molecules with 2 or more elements

every compound has it

sum of all the atomic weights of all the atoms in a compound

attractive force that a nucleaus exerts on electrons

-depends on how many positive charges the nucleus has and the distance between electrons

the sharing of electrons egually

atoms must be close in electronegativity

when electron are drawn to one nucleus more than the other

charges of atoms are found at opposite ends of the bond

electrically charged particles in an atom in the gain or loss of an electron

theres cations and anions

positive charge

less electrons than protons

negatively charged

more electrons than protons

bonds formed as a result of electron attraction with opposite charges

bond resulting from the attraction of a negatively charged atom to the positively charged atom

involves hydrogen

"water loving"

when polar atoms interact with water by hydrogen bonds

"water hating"

non polar molecules

nonpolar molecules attract to other nonpolar molecules

interactions between nonpolar substances

they occur when nonpolar molecules are in close proximity