# How Many Electrons Does Selenium Have

Atomic number of Se is 34. Selenium has 34 electrons. Electron configuration of Selenium is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4. Se is at 4th period and it’s a group 16 element in periodic table. Selenium atom has 34 protons, 45 neutrons and 34 electrons.

Selenium is a chemical element with chemical symbol “Se” and atomic number 34. It is located in the fourth period of the periodic table, group 6A, and has similar chemical behavior and reactions to its “neighbour” Sulfur (S).

Selenium can be found in different allotropic forms. The most popular of these are a red amorphous powder, a red crystalline material, and a gray crystalline metal-like form called “metallic selenium.” This last form conducts electricity better in light than in the dark and is used in photocells.

Selenium burns in air and is unaffected by water and dissolves only in concentrated nitric acid and alkalis. Illuminating the crystal selenium for 0.001 seconds increases its conductivity 10 to 15 times. Red light is more effective than shorter wavelength light.

## How many electrons does Se have

Se has 34 electrons in total. Because atomic number of Se is 34 and electron configuration for Selenium is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4. If you sum up, you can calculate the electron number of Se. 2+2+6+2+6+10+2+4 = 34. Selenium atom has 34 electrons.

## How many valence electrons does Se have?

Selenium has 6 valence electrons. Because Selenium has 34 electrons in total. To calculate valence electrons of an atom, we need to check its electron configuration. The electrons in the valence shell are the valence electrons. If we check Selenium electron configuration, the valence shells are 4s2 and 4p4 which means that the number of valence electrons in Selenium is 6.

Ground-state electron configuration of Se is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4. The last shells of electron configuration are 4s2 and 4p4. In total there are 6 valence electrons.

### How can you calculate the valence electrons in selenium?

You can calculate the valence electrons in Selenium by checking Selenium electron configuration. Valence electrons can be calculated by summing up the electron numbers in the last shell. The number of valence electrons in Selenium is 6.

Se has 6 valence electrons. Se atom has 34 electrons in total. Selenium (Se) has 6 valence electrons. Selenium electron configuration shows us that there are 34 electrons and the last shell has 6 valence electrons.

## Selenium Electron Configuration

Selenium has 34 electrons. We can write down the electron configuration with this information. Selenium electron configuration is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4.

### Se electron configuration

Se electron configuration can be found by the number of electrons Selenium atom has. Selenium atom has 34 electrons. Electron configuration for Se atom is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4.

## How many protons does selenium have

Atomic number of Selenium is 34. Atomic number is equal to the proton number of the atom. Selenium’s atomic number is 34 which means that Selenium has 34 protons. Also Selenium has 45 neutrons. If you sum up protons and neutrons, you can find the atomic mass. Atomic mass of Selenium is 79.

## How many unpaired electrons does selenium have

Electron configuration of Selenium ends with 4s2 4p4. 4p can be filled with 6 electrons. Now, imagine 3 boxes for electrons for 4p shell. These boxes should have 2 electrons in each of them. You need to place 1 electron in each of them first. Then you can place the last electron in the first box. Last 2 boxes have only 1 electron. That’s why Selenium has 2 unpaired electrons.

Argon Electron Configuration is a great source about Argon.

How Can the Presence of an Ion in a Solution Be Detected” is a great source for detecting ions.

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