Question

How many valence electrons are in atoms of radon?

Answer 1

Hint As we know that valence electrons are the electrons that are present in the outermost shell of an atom. If we have to find the valence electrons, then we must have to know the atomic number of that atom. We can use atomic numbers to write the electronic configuration and then find the electrons in the valence shell.

Complete Step by step solution:
- We should understand the meaning of the term valence. It is basically the electrons in the valence shell of an atom called valence electrons.
- As we know that the atomic number of radon is 6, and it is a noble gas. It is found in the 18 the column this means that radon will end in an electron configuration of $6{{p}^{6}}$ . So, we can see that its electronic configuration is $\left[ Xe \right]6{{s}_{2}}4{{f}^{14}}5{{d}^{10}}6{{p}^{6}}$ . The valence level that is the highest energy level s and p orbitals is $6{{s}^{2}}6{{p}^{6}}$. And we can say that there are eight electrons in the valence shell.
- From the above discussion we can understand that radon is having eight electrons in its valence shell that makes it valence electrons. Hence, in this way we can calculate the number of valence electrons in an atom

Note: As we know that valence is the combining power of an element. It is found that elements in the same group have the same valence in the periodic table. Basically the valence of an element is related to the electrons that are present in the outer shell.