chapter 1- foundations Flashcards
matter has _____ and takes up _______
mass, volume
composition vs structure
composition: what something is made of
structure: composition + how the components are organized
the fundamental unit of matter
atoms
_____s are made of only one atom
element
compounds are…
composed of 2+ elements bound by a fixed ratio
molecules are…
groups of atoms that bind tightly together and behave as a unit
diatomic molecules
2 of the same atoms that are bound together to make a molecule
7 diatomic molecules
H N F O I Cl Br
Hydrogen
Nitrogen
Fluorine
Oxygen
Iodine
Chlorine
Bromine
what is the difference between a mixture and a pure substance?
mixtures contain more then one substance, no fixed ratios
what is an alloy? Is it a mixture or pure substance?
a metal made by combining two or more metallic elements. mixture
what are the two types of mixtures
homologous and heterogeneous
homologous vs heterogeneous mixtures. provide an example
homo= all even and same (salt in water)
hetero= not even and same (sand in water)
what is the difference between compounds and a mixture?
compounds have a uniform/fixed ratios and are mixed at the chemical level. mixtures can be made of anything and are mixed at a physical level
what does filtration do to heterogeneous mixes?
sorts elements
physical changes and properties
Mass Volume Temperature Hardness Color
“My Very, Thick, Hard, Cock”