00:02
Hi there.
00:03
In this question, we have alpha decay happening.
00:07
So i want to start off by talking about what an alpha particle is.
00:16
An alpha particle is composed of two protons and two neutrons.
00:30
Okay, and as such, it is given the symbol, because the substance that would have two protons is a helium nucleus.
00:39
So it is given the symbol h .e., which has its atomic number of two, and then two protons plus two neutrons gives it a mass number of four.
00:49
So when we are writing an alpha particle, we write it as h .e.
00:53
With a mass number of four and atomic number of two.
00:56
So let's go ahead and do that as we write our balanced nuclear equation.
01:01
So we have polonium, and it has mass number of 216.
01:10
Looking at the periodic table, you can identify polonium here as atomic number 84.
01:17
So its atomic number is 84.
01:20
This is going to undergo alpha decay...