Chapter 17 Flashcards
________ discovered x-rays ( “x” was a variable /. )
-electrons at high speeds at metal
- energy given off e-e- —–> /metal
e-
Roentgen
________ discovered x-rays ( “x” was a variable /. )
-electrons at high speeds at metal
- energy given off e-e- —–> /metal
e-
Roentgen
ROENTGEN discovered ______ ( “x” was a variable /. )
-electrons at high speeds at metal
- energy given off e-e- —–> /metal
e-
X-rays
___________
- tar-like substance in mines in Czechoslovakia
- “coal tar” : used for tropical inflections
- had some “mysterious energy” as Uranium
- Marie Curie boiled down coal tar.
- discovered POLONIUM (named after Poland, her native country) and RADIUM.
- only source of Radium in the world
- won Nobel Peace prize
Marie & Pierre Curie
MARIE & PIERRE CURIE
- tar-like substance in mines in Czechoslovakia
- “________” : used for tropical inflections
- had some “mysterious energy” as Uranium
- Marie Curie boiled down coal tar.
- discovered POLONIUM (named after Poland, her native country) and RADIUM.
- only source of Radium in the world
- won Nobel Peace prize
Coal tar
MARIE & PIERRE CURIE
- tar-like substance in mines in Czechoslovakia
- “COAL TAR” :used for tropical inflections
- had some “mysterious energy” as Uranium
- Marie Curie BOILED DOWN coal tar.
- discovered _________ (named after Poland, her native country) and ______
- only source of Radium in the world
- won Nobel Peace prize
Polonium
Radium
How many protons does Uranium have?
92
________ get in the way of H2O molecules
NaCl
H2O is the most dense at..
4C
H2O is the most ______ at 4C.
dense
discribe a snowflake structure…
empty space; less dense —> float
where does 4C water go?
sinks to the bottom
when does ice form?
ICE only forms when the ENTIRE LAKE is FILLED with 4C water
why can’t Lake Tahoe freeze?
too deep
Salt _____ the freezing point of H20
Lowers
NaCl obstructs water from forming _______.
ice crystals
H2O cannot escape _________
vapor pressure
How many percent of our radiation exposure comes from NATURAL RESOURCES.
82%
How many percent of our radiation exposure comes from ARTIFICIAL SOURCES?
18%
What are the NAURAL RESOURCES that take up 82% of our radiation exposure
natural radionuclides in your body
cosmic rays
radon (gas emitted by the earth)
rocks, soil, etc
-NATURAL COSMIC RADiate ROCKS
how many millirems and rems do we get hit with per year?
200-400 millirems per year
0.3-0.4 rems
when does radiation sickness set in at?
cancer risk?
200-300 rems exposure
50% higher cancer risk
symptoms of radiation sickness
anemia (low RBC/WBC) hair loss burns nausea weight loss lowered immunity *** THE ANEMIC LOST HAIR due to BURNS & NAUSEA. she LOST WEIGHT and her IMMUNITY DROPPED
______: 50% chance of death within 30 days
600 rems
how many percent does radon take up in 82% of natural sources?
55%
