15 Which of these substances is an example of a solution?

A. milk
B. brass
C. mercury
D. concrete

a

explanation:

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

→

answer; natural resources;

increased stability in the completion of fluorine's outer shell.