How many valence electrons does Krypton (Kr) have?
I think it's 8
right
Krypton (Kr) is the element with atomic number 36. To determine the number of valence electrons for an element, you need to look at its position on the periodic table. Krypton is located in Group 18, which is also known as the noble gases.
The noble gases, including krypton, have full valence electron shells. A valence electron shell can hold up to a maximum of 8 electrons. Since krypton is in the 18th group, it has a total of 4 electron shells. The first shell can hold a maximum of 2 electrons, the second shell can hold a maximum of 8 electrons, the third shell can hold a maximum of 18 electrons, and the fourth shell can hold a maximum of 32 electrons.
Since krypton has 36 electrons in total, you can determine the number of valence electrons by subtracting the number of electrons present in the inner shells from the total number of electrons. In the case of krypton, the first three shells are completely filled with electrons, leaving only the fourth shell with electrons. Therefore, krypton has 8 valence electrons.
So yes, you are correct. Krypton has 8 valence electrons.