NAS2 ATOMS AND BONDS

C 6

H 1

N 7

O 8

P 15

S 16

electron sharing produces molecules in which the shared electrons occupy a singal orbit common to both atoms forming a covalent bond

the ratio of masses in a pure sample is identical. for elements and molecules

complete transfer of electrons

unequal sharing of electrons

equal sharing of electrons

average of the relative weights(mass Number) of all isotopes in an element

Isotope mass X Abundance +total AMU

sum of the masses of the isotopes protons and neutron

atomic number of any atom is equal to the number of protons

H with just one proton and one electron

WHEN A HYDROGEN ATOM ALREADY COVALENTLY LINKED TO ONE ELETRONEGATIVE ATOM IS ATTRACTED BY ANOTHER ELECTRON HUNGRY ATOM (usually nitrogen or oxygen)

when a combination of 2 or more atoms are held together by chemical bond.

substances composed of two or more components physically mixed

when 2 or more diff. kinds of atoms bind