Question

What is the half-life of this radioactive substance? Count rate graph attached.

Answer 1

Half life is when the starting or initial value goes down to half its amount.
At t=0s, the count per minute is 240.

Answer 2

So the half-life is the time taken for the count rate to be 120? @Shalante

Answer 3

Yes 240/2=120
Now figure the day period that the counting per minute is 120. It can in decimals or fraction.

Answer 4

Okay. Thank you so much!

Answer 5

No problem!

Answer 6

shal can you help me it wont let me post so here you go The shape a mineral forms when slowly solidifying one layer of molecules at a time is called
A. hardness
B. luster
C. crystal form
D. geoform

Answer 7

Probably geoform, but I haven't taken that class yet.

Answer 8

Crystals in a mineral are in layers after layers.

Answer 9

thank you