B Bi-214 19.9 m
B
0.
Pb-210
223 a
Po - 214
44
1.64x10
Element Names
U - uranium
Th-thorium
Ra-radium
Pa - protactinium
Rn - radon
Po - polonium
Bi-bismuth
Pb-lead
Half-life units
a - years
d-days
h-hours
m-minutes
S-seconds
Bi-210
5.0 d
B
Pb-206
Stable
Po-210
138.4 d
O2
Which of the first four radioisotopes in the decay series has the longest half-life?
O Pa-234
Th-234
U-234
U-238

When is a hurricane considered to have made landfall? a. when at least one inch of rain occurs b. when the eye reaches the land mass c. when the outer wind bands make landfall d. when it moves inland from the coast

Question 3(multiple choice worth 4 points) (02.04 lc) which best describes the function of chloroplast? allows certa molecules to enter and exit the cell makes food during photosynthesis detoxifies waste products o packages proteins into vesicles

The graph below compares the rates of reaction of a burning candle and an exploding firework. comparing chemical reactions what can you conclude from the graph? the reaction that causes a firework to explode requires less energy to start, and occurs more rapidly than the reaction that causes a candle to burn. the reaction that causes a firework to explode requires less energy to start, and occurs less rapidly than the reaction that causes a candle to burn. the reaction that causes a firework to explode requires more energy to start, and occurs less rapidly than the reaction that causes a candle to burn. the reaction that causes a firework to explode requires more energy to start, and occurs more rapidly than the reaction that causes a candle to burn. mark this and return