Question

Need help with science!
Which of the following statements about radioactive decay is true?
a. radioactive decay is the rate at which new atoms form.
b. During radioactive decay, atoms break down, releasing, particles or energy.
c. the rate of decay of a radioactive element cannot be approximated.
d. the number of radioactive atoms in a sample will always remain constant.

Which of the following terms refers to the time it takes for one-half of the radioactive atoms in a sample of a radioactive element to decay?
a. relative age.
b. absolute age.
c. potassium-argon date
d. half-life

Answer 1

i also have two more. because it didnt fit.
Geologists use radioactive dating to?
a. determine the relative age of rock layers
b. tell the difference between molds and casts
c. tell where one soil horizon ends and the next one begins
d. determine the absolute age of rocks

if the half-life of a 20.0 g sample is know to be 24 minutes, how long will it take for only 5.0 grams of the sample to remain?
a. 6 minutes
b.24 minutes
c. 48 minutes.
d. 96 minutes

Answer 2

@jigglypuff314

Answer 3

much better :)

now...
"decay" = "break down"
"one half" = "half-life"
radioactive dating is for absolute age.
20g 24minutes later would be 10g then another 24minutes later would be 5g
so 24 + 24 =

Answer 4

so number 1 is b, number 2 is b, number 4 is c, what is number 3?
Thanks btw:) @jigglypuff314

Answer 5

1. "decay" = "break down"
2. "one half" = "half-life"
3. radioactive dating is for absolute age.
4. 20g 24minutes later would be 10g then another 24minutes later would be 5g
so 24 + 24 =

Answer 6

Thanks i got them all correct :) @jigglypuff314

Answer 7

you're welcome :)
but try not to say things so bluntly like that on here ;)
there's a no cheating rule on this site and I'm not supposed to be giving answers :P