If the half life of Substance A is 0.5 years, how long would it take for 2 grams of substance A to remain given an initial mass of 16 grams?

Time taken is given by :

   .......( 1 )

Also,

Putting value of k in equation 1, we get :

Therefore, time taken is 1.5 years.

Hence, this is the required solution.

atomic number of carbon is 6

electronic configuration of carbon is 1s²2s²2p²

orbital diagram of c is as shown here in the image.