gen chem Flashcards
(51 cards)
can be observed, measured, and tested, without changing the composition of matter.
physical properties
do not depend on the amount Of matter present or being measured
intensive properties
properties that depend on the amount of matter present or being tested
extensive properties
are properties involved in the transformation. of substances into other materials
chemical properties
do not alter the identity of a substance
physical change
produce new compound with a different chemical composition
chemical change
TYPES OF CHEMICAL REACTION
- COMBINATION REACTION
- DECOMPOSITION REACTION
- SINGLE REPLACEMENT REACTION
- DOUBLE REPLACEMENT REACTION
A + B = AB
COMBINATION REACTION
AB = A + B
DECOMPOSITION REACTION
A + BC = AC + B
SINGLE REPLACEMENT REACTION
AB + CD = AC + BD
DOUBLE REPLACEMENT REACTION
2 ways to classify matter
- Classify according to it’s physical state solid, liquid, or gas
- Classify it according to it’s composition a pure substance or a mixture
contains only one kind of element or compound.
pure substance
are substances composed of only one kind of atom
elements
lightest element among the others. First element in the periodic table
hydrogen
most abundant elements in the universe
carbon
found on toothpaste in the form of flouride
flourine
first metals used by man
copper
most abundant metals in the earth’s crust
aluminum
commonly used in food preservation
sodium
reactive metal never found free in nature
pottasium
metal that exists in liquid state
mercury
essential elements needed by the body, makes bones stronger
calcium
yellowish nonmetal found in volcanic events
sulfur
