3) hydrogen and oxygen atoms forms water
Answer:
the answer is Bond Number
Explanation:
b r u h i just took the quiz and got the answer wrong lol
so turns out its BOND NUMBER
Y is Po-218.
<h3>Explanation </h3>
Here's the symbol of a particle in a nuclear reaction. .
A stands for mass number. Z stands for atomic number. Both numbers shall conserve in a nuclear reaction.
- The mass number on the left hand side is 222.
- The two mass numbers on the right hand side add up to A + 4.
- 222 = A + 4.
- A = 218
So is the case for the atomic number. Try figure out the atomic number of Y using the same approach.
- The atomic number on the left hand side is 86.
- The two atomic number on the right hand side add up to __ + __.
- 86 = __ + __.
- Z = 84.
What element is Y? The atomic number of Y is 84. Refer to a periodic table. Element 84 corresponds to Po (polonium). Y is Polonium-218. The symbol of Y should be written as . Hence the equation:
.
Answer : The correct option is, (A) Aluminum foil
Explanation :
Penetration power : It is the movement of particles or the ray through an object. As we know that the more the energy of a particle, the more will be the penetrating power.
The ascending order of the penetration power of alpha rays, beta rays, and gamma rays are:
Alpha rays < Beta rays < Gamma rays
The penetrating power of the alpha, beta and gamma rays varies greatly. That means,
- The alpha particles are restricted by paper.
- The beta particles can pass through the paper but it can not pass through the aluminum foil.
- The restriction of gamma rays is very difficult. It can be restrict or blocked only by concrete, lead, or other heavy shielding.
Hence, Aluminium foil will stop beta particles.