Chapters 1 & 2 Flashcards
CHEMICAL
any substance with a definite composition
MATTER
anything that has mass and takes up space
ATOM
smallest, most basic form of matter
COMPOUND
substances that are joined by chemical bonds made of 2+ different elements
PHYSICAL PROPERTIES
properties observed without changing a substance
CHEMICAL PROPERTIES
substances’ ability to undergo changes into a different susbstance
PHYSICAL CHANGE
identity of substance does NOT change
CHEMICAL CHANGE
identity of substance DOES change
REACTANTS, WHERE DO THEY GO?
reactants on LEFT of arrow
PRODUCTS, WHERE DO THEY GO?
products on RIGHT of arrow
SOLID
has volume
has shape
LIQUID
has volume
“no shape”
GAS
no shape
no volume
HOMOGENOUS MIXTURE
2 states of matter making a mixture
HETEROGENOUS
do NOT make a mixture
PERIODIC TABLE: GROUP
VERTICAL columns
PERIODIC TABLE: PERIOD
HORIZONTAL rows
METALS
good electrical and heat conductors
NONMETALS
poor conductors of heat and electricity
METALLOIDS
have both characteristics of both metals and nonmetals
QUALITATIVE VS QUANTITATIVE
descriptive vs numerical value
CONVERSIONS NEGATIVES
10^-6 micro
10^-3 milli
10^-2 centi
10^-1 deci
CONVERSIONS POSITIVES
10^6 mega
10^3 kilo
10^2 hecto
10^1 deka
PERCENTAGE ERROR FORMULA
experimental value - accepted value divided by accepted value x 100
DENSITY
mass divided by volume
PURE SUBSTANCE
either single element or single compound and physics properties
