Both elements and compounds are pure substances Compounds are made by chemically combining 2 or more elements the only way to break down a compound is by another chemical changethey break into smaller compounds and elements ID: 278316
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Slide1
GLE #1
Both elements and compounds are pure substances
Compounds are made by chemically combining 2 or more elements (the only way to break down a compound is by another chemical change-they break into smaller compounds and elements)
Smallest piece of an element is an atom
Smallest piece of a compound is a moleculeSlide2
Hydrogen + Oxygen
H(2):
Hydrogen (gas) burns, reacts
explosively
with oxygen, chlorine and
fluorine
O
: Oxygen (gas) very reactive, needed for
fire
Slide3
Water
H2O- water
liquid (typically)
puts out fireSlide4
Sodium + Chlorine
Na: Sodium (solid, metal) Reacts violently w/water
Cl
: Chlorine (gas) Poisonous
Slide5
Table Salt
NaCl
– table salt
safe to eat
dissolves in water
solidSlide6
Carbon + oxygen
C: Carbon (solid) charcoal/diamonds
O: Oxygen (gas) very reactive, needed for fire
Slide7
Carbon Dioxide
CO2- carbon dioxide
what animals exhale
what plants take inSlide8
Carbon+Hydrogen+Oxygen
C (6):
Carbon (solid) charcoal/diamonds
H (12):
Hydrogen (gas) burns, reacts explosively
with
oxygen, chlorine and fluorine
O (6):
Oxygen (gas) very reactive, needed for fire
Slide9
Glucose (Sugar)
C6H12O6- glucose (sugar)
dissolves in water
solid
edibleSlide10
Nitrogen + Hydrogen
N: Nitrogen (gas) not reactive as an element
H (3):
Hydrogen (gas) burns, reacts explosively with oxygen, chlorine and fluorine
Slide11
Ammonia
NH3- ammonia
gas
pungent odor
dissolves in water
(household cleaner
)
used in fertilizers, plastics
and explosivesSlide12
Sodium+Hydrogen+Carbon+Oxygen
Na: Sodium (solid, metal) Reacts violently w/water
H: Hydrogen (gas) burns, reacts explosively with oxygen, chlorine and fluorine
C: Carbon (solid) charcoal/diamonds
O (3):
Oxygen (gas) very reactive, needed for fire
Slide13
Baking Soda
NaHCO3- Baking Soda (sodium bicarbonate)
cleaning
(clothes,
teeth
,
etc
.)
cooking
deodorizing
puts
out grease
and electric
fires