chem Flashcards
How ar elements represented in the periodic table in terms of valence shells
the amount of molecules in the shells represents what place they are in the periodic table and how many spaces they have open for bonding
what are three parts of an atom and its charges
neutrons-neutral, protons-positive, electrons-negative
hwo is atomic number determined
by the number of proton
how is atomic weight determined
protons plus neutrons
how can the same element have different atomic mass
if they are isotopic, meaning that the number of neutrons differ
why don’t atoms gain electrons or neutrons to get charge
the it’ll be a different element
why do elements get charged
to gain or lose electrons and become more stable
a charged particle is called an___
ion
which side of the periodic table is positively and negatively charged and why
the left side is positive while the right side is negative, this happens so that opposites attract each other
why is carbons ability to form double and triple bonds important
it allows for a lot variety and ability to make complex molecules
why cant silicone be used to make organic bases instead of carbon
silicone is not as stable as carbon
what does every line between atoms represent in a molecule
a bond
how many spaces does hydrogen have left to bond, as well as oxygen and nitrogen
hydrogen, oxygen-2, nitrogen-3
ionic vs covalent bond
ionic=formed by ions, covalent=formed by charing electrons
what is a buffer
a compound that minimizes the changes in pH
