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How many electrons must be gained or lost for selenium to achieve a noble gas electron configuration?

Selenium should gain two electrons and lose six electrons to achieve a noble gas electron configuration.


What is the noble gas configuration for selenium?

The noble gas configuration for selenium is [Ar] 3d10 4s2 4p4, which means it has the same electron configuration as argon, followed by 4d10 4p4 electrons.


What noble gas is isoelectronic with the selenium?

None. The Se2- ion is isoelectronic with Krypton.


Which is a colorless odorless gas with low chemical reactivity based on the periodic table selenium chlorine xenon or carbon?

Xenon as it is a noble gas. Noble gases are inert and do not react with anything. Selenium is a solid Chlorine is a green coloured highly reactive poisonous gas. Carbon is a non-metallic solid.


Noble gas electron configuration of selenium and phosphorus?

The noble gas electron configuration of selenium is [Ar] 3d^10 4s^2 4p^4 and for phosphorus is [Ne] 3s^2 3p^3. These configurations indicate how the electrons are arranged in the outermost energy levels of the atoms, resembling the stable electron configurations of noble gases.


Is selenium a gas?

No, selenium is solid.


Is selenium a colorless gas?

No, selenium is solid.


What would have to gain two electrons in order to achieve the same number of electrons as a noble gas O or Sr or Na or Se or Br?

Oxygen, O ,and selenium Se. O (oxygen) would have to gain two electrons in order to achieve the same number of electrons as Ne (neon, a noble gas). Selenium would gain two to achieve the same number of electrons as Kr, krypton (noble gas). They would form the oxide, O2- and selenide Se2- ions


What will happen to an atom of selenium in order to form a octet?

An atom of selenium will gain two electrons to form an octet in its valence shell. This will allow it to achieve a stable electron configuration similar to a noble gas.


Is krypton halogen noble gas or neither?

No, it is a noble gas


Is selenium a greenhouse gas?

No, it is a solid.


Why is the first ionization energy of krypton greater than selenium?

The first ionization energy of krypton is greater than that of selenium because krypton is a noble gas with a full valence shell, making it more stable and harder to remove an electron from compared to selenium, which is a nonmetal and has an incomplete valence shell. This results in a higher ionization energy for krypton.