After a radioactive atom decays, it is the same element that it was before with no measurable change in mass. which kind of decay has occurred, and how do you know? a) alpha decay because alpha particles have no mass b) beta decay because this kind of decay cannot change one element into another c) alpha decay because it creates a new isotope of the same element d) gamma decay because photons have no mass

D)  Gamma decay because photons have no mass

Explanation:

1) Gamma ray emission: It is a decay process in which an unstable nuclei gives excess energy in the form of electromagnetic radiations[/tex]. This process does not lead to change in mass number.

2) Alpha Decay: In this process, a heavy nucleus decays into lighter nucleus by releasing alpha particle or a helium atom. The mass number is reduced by 4 units.

3) Beta decay:  It is a type of decay process, in which a neutron turns into a proton and release a electron. In this the atomic number decreases by one  and hence a new element gets formed. The mass number remains same.

i believe the answer is three water molecules

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 .