vocabulary
what are physical properties?
characteristics that can be observed and determined without changing matter
what are involved when atoms bond
electrons
NaCl
sodium chloride
what gas was used in the Hindenburg
hydrogen
how many rows are on the periodic table
7
what are chemical properties?
properties that describe how a substance reacts with other substances
what type of bond is formed when electrons are shared between 2 atoms
covalent
CaCl2
calcium chloride
what color is sulfur
yellow
how is the periodic table arranged
nonmetals and metals
what is fission?
nucleus is split into smaller fragments
how many electrons are needed to form a single bond
2
Al2O3
aluminum oxide
why should you never touch mercury
it is a carcinogen
name of columns of elements on the periodic table
groups
what is transmutation?
conversion of an atom of one element to an atom of another element
when does ionic bonding occur
when atoms gain or lose electrons
Bal2
barium iodide
what is hydrogen peroxide used for
treating wounds
most of the chemical elements on the periodic table are what
metals
what is a polyatomic ion?
an ion that consists of more than one atom
what element is a covalent bond most likely to occur in
nonmetals
CO2
carbon dioxide
what is ammonia
a disinfectant
what side of the periodic table are the noble gases on
right side