Chem Test 1
Terms
undefined, object
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- gas > liquid
- condensation
- density
- mass/volume
- qualitative
- appearance, no tools
- average atomic mass
- weighted average of isotopes of element
- liquid
- definite volume, indefinite shape
- liquid > solid
- freezing
- cation
- positive charge
- volume
- L x W x H
- atom
- smallest unit of an element that maintains the properties of that element
- solid
- definite volume and shape
- gas
- indefinite volume and shape
- Democritis
- founded the word atom
- three phases of matter
- solid, liquid, gas
- volume (def)
- amount of space an object occupies
- law of multiple proportions
- if two or more different compounds are composed of the same two elements, the ratio of the masses of the second element to the first is always a ratio of small whole numbers
- ion
- different number of electrons
- intensive properties
- do not depend on amount of matter (boiling point, density, reactivity)
- chemical properties
- measured by determining a substances ability to undergo changes into a different substance
- physical properties
- do not change identity of substance
- solid > liquid
- melting
- precision
- doing something over and over again
- pure substance
- made up of elements
- solid > gas
- sublimation
- non-metals
- brittle, poor conductors, dull
- anion
- negative charge
- law of definite proportions
- chemical compound always contains the same elements in the same proportions by mass regardless of the size of the sample
- homogenius mixture
- can not see different parts
- mass
- amount of matter
- area
- L x W
- heterogenius mixture
- can see different parts
- mixture
- two or more types of matter with own properties
- isotope
- different number of neutrons if mass is different
- accuracy
- how close you are to a specific value
- law of conservation of mass
- mass is neither created nor destroyed during chemical reactions
- chemical change
- when one or more substances are converted into different substances
- liquid > gas
- evaporation
- chemistry
- study of composition, structure, and properties of matter and the changes it undergoes
- metals
- shiny, good conductors, malliable, ductile
- quantitative
- numbers, can be measured using a tool
- element
- pure substance, one type of atom
- matter
- anything with mass and volume; takes up space
- extensive properties
- depend on amount of matter (volume, mass, energy)
- physical change
- does not alter chemical properties; can revert back to reactants
- number of neutrons
- mass-protons
- Aristotle
- atoms do not exist, all matter is continuous