Question | Answer |
PRHPMEDOCT | problem research hypothesis procedure experiment data observations conclusion theory |
matter | anything that takes up space and has mass matter is made up of atoms |
model | a mental picture or figure |
proton | a subatomic particle with a positive charge found in the nucleus of an atom |
neutron | a subatomic particle with a neutral charge found in the nucleus of an atom |
electron | a subatomic particle with a negative charge moving around the nucleus |
Bohr model of an atom | an atomic model in which the electrons move around the nucleus in orbits developed by Neils Bohr, a Danish scientist. |
elements | made up-up of one type of atom |
atomic number | the number of protons in an atom |
family | a group of elements found vertically on the periodic table having similar characteristics |
the periodic table | the table that contains info about elements arranged by atomic number. |
metals | shiny can be shaped good conductors of heat and electricity |
nonmetals | dull can't be shaped not conductors of heat and electricity |
semimetals | share characteristics of both metals and nonmetals |
noble gases | dont combine easily with other elements |
energy levels | the number of electrons in each level of an atom |
compound | substance formed when two or more elements combine chemically and form a new substance |
chemical bond | forces that hold atoms together in a compound |
ion | atoms that have lost or gained an electron |
molecule | particle formed by sharing electrons |
chemical formula | a group of symbols that represent the elements in a compound |
chemical symbol | a letter that stands for the name of an element |
organic compounds | any compound that contains carbon |
organisms | any living thing |
hydrocarbon | any compound that contains only hydrogen and carbon |
polymer | an organic compound made of a chain of carbon atoms |
indicator | a dye which changes color when mixed with an acid or a base |
acid | a compound that turns blue litmus red and has a pH of 0-6 |
base | a compound that turns red litmus blue and has a pH of 8-14 |
mono | one |
di | two |
tri | three |
tetra | four |
h2o | water |
co2 | carbon dioxide |
NaCl | sodium chloride |
CO | carbon monoxide- dangerous |
nh3 | ammonia- dangerous |
so2 | sulfur dioxide-dangerous |
pH of 7= | neutral |
salts | formed when an acid is combined with a base |
neutralization | a chemical change when an acid is combined with a base neutralizing the acid and forming a salt and water |
hydrogen | h |
carbon | c |
oxygen | o |
neon | ne |
sodium | na |
magnesium | mg |
aluminum | al |
sulfur | s |
calcium | ca |
colbalt | co |
copper | cu |
tungsten | w |
tin | sn |
gold | au |
mercury | hg |
lead | pb |
uranium | u |
helium | he |
nitrogen | n |
neon | ne |
magnesium | mg |
silicon | si |
chlorine | cl |
iron | fe |
zinc | zn |
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