## babymomma123456 Group Title A sample of rock is found to contain 200 grams of a parent isotope. How many grams of the parent isotope will remain after one half-life one year ago one year ago

1. mathslover Group Title

Hello @babymomma123456 : ${\boxed{\boxed{\LARGE{\stackrel{\color{red}{\ast\qquad\star\qquad\ast\qquad\star\qquad\ast\qquad\star\qquad\ast\qquad\star}}{\mathscr {\color{orange}{Welcome } \quad \color{green}{To}\quad \color{purple}{OpenStudy }!!}}}\\{\color{pink}{\ast\qquad\star\qquad\ast\qquad\star\qquad\ast\qquad\star\qquad\ast\qquad\star}}}}}$ Please put this question in chemistry section. You can search for the chemistry section by clicking on the 'Find more subjects' tag. Please refer to the following link to begin with OpenStudy . $$\large{\textbf{A guide to OpenStudy : }}$$ http://prezi.com/fs3hqdpcopic/an-unofficial-guide-to-openstudy/ And : OpenStudy code-of-conduct : http://openstudy.com/code-of-conduct

2. rajathsbhat Group Title

*HALF* life. HALF. H.A.L.F. $\Large \textbf{HALF}.$ huge clue. And @mathslover, that's too flashy ;P

3. AravindG Group Title

^^agreed

4. mathslover Group Title

:) The LaTeX used by me doesn't slow down the page and also the welcome to OS latex I used is taken from the hartnn's post.