Chemistry 2024/2025
alkali metals - ansthe highly reactive metallic elements located in group 1 of the periodic table
Alkaline Earth Metals - ansAn elements in Group 2 of the periodic table that are harder than Alkali Metals and
less reactive
atom - ansThe smallest particle of an element
atomic mass - ansprotons + neutrons in the nucleus of an atom
atomic number - ansthe number of protons in the nucleus of an atom
boiling point - ansthe temperature at which a substance turns from liquid to gas
Chemical Change - ansa change that produces matter with a different composition than the original matter
Chemical Properties - anscharacteristic that can only be observed by changing the substance
chemical reaction - ansa process in which one or more substances are changed into others
Chromatography - ansa process used for separating mixtures by differences in absorbency
Compound - anstwo or more elements that are chemically combined
Democritus - ansGreek philosopher who developed an atomistic theory of matter (460-370 BC)
Density - ansthe amount of mass in a given volume,
, mass divided by volume
Distillation - ansthe process of purifying a liquid by boiling it and condensing its vapors
Dmitri Mendeleev - ansCreated the first periodic table, arranged elements by increasing atomic mass
ductility - ansability of a substance to be stretched into thin wires
Electron Cloud - ansa region around the nucleus of an atom where electrons are likely to be found
Electrons - ansNegatively charged subparticles that orbit around the nucleus of the atom
element - ansa pure substance made of only one kind of atom
Elemental Symbol - ansA one or two letters used to represent an element on the Periodic Table
energy level - answhere electrons are found
Ernest Rutherford - ansdiscovered the nucleus
Filtration - ansa process that separates materials by passing it through a filter
halogens - ansthe highly reactive group of nonmetals located in Group 17 of the Periodic Table
heterogenous mixture - ansa mixture in which you can see the different parts
homogenous mixture - ansMixture that is the same throughout
alkali metals - ansthe highly reactive metallic elements located in group 1 of the periodic table
Alkaline Earth Metals - ansAn elements in Group 2 of the periodic table that are harder than Alkali Metals and
less reactive
atom - ansThe smallest particle of an element
atomic mass - ansprotons + neutrons in the nucleus of an atom
atomic number - ansthe number of protons in the nucleus of an atom
boiling point - ansthe temperature at which a substance turns from liquid to gas
Chemical Change - ansa change that produces matter with a different composition than the original matter
Chemical Properties - anscharacteristic that can only be observed by changing the substance
chemical reaction - ansa process in which one or more substances are changed into others
Chromatography - ansa process used for separating mixtures by differences in absorbency
Compound - anstwo or more elements that are chemically combined
Democritus - ansGreek philosopher who developed an atomistic theory of matter (460-370 BC)
Density - ansthe amount of mass in a given volume,
, mass divided by volume
Distillation - ansthe process of purifying a liquid by boiling it and condensing its vapors
Dmitri Mendeleev - ansCreated the first periodic table, arranged elements by increasing atomic mass
ductility - ansability of a substance to be stretched into thin wires
Electron Cloud - ansa region around the nucleus of an atom where electrons are likely to be found
Electrons - ansNegatively charged subparticles that orbit around the nucleus of the atom
element - ansa pure substance made of only one kind of atom
Elemental Symbol - ansA one or two letters used to represent an element on the Periodic Table
energy level - answhere electrons are found
Ernest Rutherford - ansdiscovered the nucleus
Filtration - ansa process that separates materials by passing it through a filter
halogens - ansthe highly reactive group of nonmetals located in Group 17 of the Periodic Table
heterogenous mixture - ansa mixture in which you can see the different parts
homogenous mixture - ansMixture that is the same throughout
