00:04
In this question, we are provided with several statements and asked to figure out if these statements are true or false.
00:11
So the first statement says that a radioactive atom decays the same way whether or not the atom is chemically bonded in a compound.
00:24
So what it's saying is that regardless of the chemical nature of isotope, whether if it's just in the elemental form or if it's making a compound with the first counter ion or if it's making a compound with a different counteriron, regardless of the chemical difference of the isotope, it will decay the same way.
00:55
So this is true.
00:56
The chemical nature does not change as long as it's the same isotope.
01:05
And it will decay the same way.
01:07
Yes.
01:08
And in statement b says the chemical properties of a radioactive atom of an element are different from the chemical properties of non -radiactive atoms that are from the same element.
01:25
This is actually false because, as i just mentioned, if it's the same isotope, the chemical properties will be the same.
01:44
So we don't say that it's the same isotope if there are different numbers of neutrons.
01:50
But as long as it's the same type of atom, let's say, for example, calcium 40, and then there's calcium 39.
02:01
So, and then there'd be like a stable form of calcium.
02:05
All of them will have the same chemical properties, regardless of the fact that they are different isotopes of the same.
02:15
Element.
02:17
So the second statement is false.
02:21
The third statement says alpha rays have more penetrating power than beta rays.
02:26
This is false.
02:28
Alpha is the heaviest type of ray and being heavy reduces its penetration power.
02:39
And then in the statement d, we're told that alpha and beta rays are particles, but gamma is a form of.
02:48
Of energy or it's an energy ray.
02:51
This is true.
02:53
Alpha and veta are considered particles while gamma is considered energy.
03:00
Statement e says the radioactivity is a nuclear change that has no effect on the electrons in the surrounding atoms of that nucleus.
03:11
This is false.
03:13
It is definitely a nuclear change of a initial atom but it has effect on the electrons of the nearby atom.
03:23
So that statement is false.
03:26
Statement f says the number of protons in a nucleus will change when a beta particle is emitted.
03:34
So this is, there is a change in the number of protons when a initial nucleus emits beta particles.
03:52
And then if we move on to statement g, we are told that the mass number of a nucleus will change when it emits an alpha particle, but not when it emits a beta particle.
04:06
This is also true.
04:11
So, beta particles have a mass of zero unlike alpha particles.
04:16
So there won't be a change in the mass number for a nucleus that emits a beta particle...