Enter a balanced nuclear equation for the alpha decay of astatine-217

Astatine has atomic number 85. "217" is the mass number of this isotope of At.

The mass number of an atom decreases by 4 as it undergoes alpha decay. Its atomic number decreases by 2. It emits an alpha particle, which is a helium-4 nucleus, in this process. The alpha particle has mass number 4 and atomic number 2.

The daughter nucleus has mass number 217 - 4 = 213 and atomic number 85 - 2 = 83. The atomic number of 83 corresponds to bismuth. Therefore the daughter nucleus is an atom of bismuth-213.

By convention, write the mass number A on the top-left corner of an element. Write its atomic number Z on the bottom-left corner. Note that A is always greater than Z for an isotope.

the formula for the conversion of temperature from degree celsius to kelvin is:

the sample of water at is converted to kelvin temperature by using the above formula as:

on comparing the two samples of water at or we can say that at and at respectively. the difference between the temperatures of two samples of water is:

hence, one can say that the sample of water at is greater than the sample of water at by .