20 minutes.
The sample would lose one half the quantity of francium in each half-life.
Thus a mass decrease by a factor of 16 would correspond to a period of four half-lives. It took 80 minutes for the sample to lose all these francium, therefore
minutes.
They can form acids or ‘acid rain’ like nitric acid or sulfuric acid which can damage buildings and structures.
<span>element have one or two additional neutrons than proton, making it unstable.</span>
Answer: thermometer is sensitive to change in Temperature
Explanation: thermometer is made of tiny glass and within the thermometer is liquids like alcohol and Mercury that are very sensitive to change in Temperature,when a thermometer is placed in an environment where there is increase in Temperatue,the liquid in the thermo
