Science EARth AD Flashcards
1
Q
PROTONS PLUS NEUTRONS
A
MASS NUMBER
2
Q
protons
A
ATOMIC NUMBER
3
Q
2 protons / neutrons are emitted , new element formed
A
ATOMIC DECAY
4
Q
time needed for half of a sample of a radioactive substance to undergo changes
A
HALF LIFE
5
Q
element with same proton but different neutron
A
ISOTOPE
6
Q
positively charge / atomic number
A
PROTONS
7
Q
unstable , DECAYS
A
PARENT
8
Q
STABLE, NOT DECAYS
A
DAUGHTER
9
Q
determining numerical age of rocks using radioactive dating
A
ABSOLUTE DATING
10
Q
radioactive isotopes fund in fossil or rocks are used
A
RADIOACTIVE DATING
11
Q
for age of fossils
A
CARBON 14
12
Q
for rock age
A
URANIUM 238
13
Q
numbers of isotopes?
A
10 NATURAL 19 ARTIFICIAL
14
Q
potassium - argon dating
A
potassium 40 / 100 k years
15
Q
USE TO MEASURE THE ISOTOPE RATIOS
A
THERMAL IONIZATION
