Chapter 1 Flashcards
(28 cards)
Matter
has mass and occupies space
Gas
no fixed volume
liquid
distinct volume, no shape; takes shape of container
solid
definite volume and shape
element
can’t be decomposed in simpler substances
Ex. one kind of atom (Ag)
compound
composed of more than one kind of element
Ex. H2O
atom
single, smallest building block of matter
molecule
2 or more atoms bonded together in specific ratios and shapes
diatomic elements
“Have no fear of ice cold beer”
Hydrogen
Nitrogen
Fluorine
Oxygen
Iodine
Chlorine
Bromine
pure substance
whose properties are uniform regardless of sample
mixture
combinations of pure substances; composition can vary
homogeneous
uniform throughout
ex. Jello, clean air
heterogeneous
not uniform throughout
ex. concrete, polluted air
physical property
can be measured without changing identity
ex. color, melting point
chemical property
how something reacts; substance loses identity
intensive property
does not depend on amount
ex. boiling point, density
extensive property
depends on quantity
ex. mass, volume
physical changes
changes physical appearance
ex. ice melting
chemical changes
substance is converted into new substance
ex. rust
length
meter (m)
mass
kilogram (kg)
temperature
kelvin (K)
time
seconds (s/sec)
amount
moles (mol)
