David kept 100 grams of radioactive sodium in a container. he observed the amount of sodium left in the container after regular intervals of time and recorded them in the table shown below.

time (hours) amount of sodium in container (in grams)
0 100
15 50
30 25
45 12.5

based on the observations, which of these is most likely david's inference?
a. the half life period of radioactive sodium is 15 hours.
b. the half life period of radioactive sodium is 50 hours.
c. the amount of sodium left in the container after 60 hours will be 10.5 grams.
d. the amount of sodium left in the container after 60 hours will be 1.5 grams.

A. The half life period of radioactive sodium is 15 hours.

Explanation:

Half life is the time taken by a reactant to reduce to its original concentration. It is designated by the symbol .

Given:

At 0 hours the amount of sodium in container is 100 grams

After 15 hours , the amount of sodium in container is 50 grams which is half of the original amount of 100 grams.

It will take 15 hours for half of a 100 g sample to decay to half of the amount i.e. 50 grams.

one state would change   like louisiana to texas. thats a change

explanation:

answer: the primary difference between a hypothesis and a theory is that b hypothesis is falsifiable, but a theory has been proven to be correct. theory is an explanation of something that is happening but hypothesis is a guess of something that can happen

explanation: