23. You have 100 grams of radioactive C=14 The half life of C=14 is 5730 years. How many grams are left after 1 half life? 100 grams 2 grams 25 grams 50 grams

The half-life of a radioactive substance is the time it takes for half of the substance to decay. In this case, the half-life of Carbon-14 (C=14) is given as 5730 years. This means that after 5730 years, half of the original amount of Carbon-14 will have decayed. <br /><br />Given that we start with 100 grams of Carbon-14, after one half-life (5730 years), half of this amount will have decayed. Therefore, we will be left with half of the original 100 grams. <br /><br />To calculate this, we simply divide the original amount by 2. <br /><br />\[100 \div 2 = 50\]<br /><br />So, after one half-life, we will be left with 50 grams of Carbon-14.