Selenium (Se) - 34 on the Periodic Table | Periodic Table

Standard IUPAC: Selenium • Symbol: Se • Atomic Mass: 78.971 u

Quick Factsheet: Selenium (symbol Se, atomic number 34) is element 34 on the periodic table of elements. It has a standard atomic weight of 78.971 u and an electron configuration of [Ar] 4s2 3d10 4p4. On the periodic table, Selenium is classified in period 4 and group Main.

1. Periodic Table Position of Selenium (34 on the Periodic Table)

Element Selenium has atomic number Z = 34, meaning it contains 34 protons in its atomic nucleus and 34 electrons in its neutral state. On the standard periodic table of elements, Selenium is located in period 4 and group Main.

2. Electron Configuration & Oxidation States (Selenium Charges & Configuration)

Full Electron Configuration: [Ar] 4s2 3d10 4p4

Common Oxidation States (Charges): -2c,1,2c,4c,6c

3. Physical Properties & Atomic Mass (Selenium Atomic Mass)

Element Selenium has a standard atomic weight of 78.971 u. Its melting point is 494. K and boiling point is 958. K. The Pauling electronegativity value is 2.55.

Comprehensive chemical properties and data for Selenium (Se, Z=34).

Explore interactive 3D electron orbitals, isotopes, and properties on the periodic table: Open on Interactive Table 🚀

4. Related Elements in the Same Chemical Family

H (Z=1) C (Z=6) N (Z=7) O (Z=8) F (Z=9) P (Z=15)

5. Frequently Asked Questions about Selenium (FAQ)

What is the chemical symbol and atomic number of Selenium?

The chemical symbol of Selenium is Se and its atomic number is 34.

What is the atomic mass and electron configuration of Selenium?

Selenium has a standard atomic mass of 78.971 u and ground-state electron configuration of [Ar] 4s2 3d10 4p4.

What periodic table group and period does Selenium belong to?

Selenium is located in period 4 and group Main on the periodic table of elements.

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