ヘリウム (He) - 2 on the Periodic Table | 周期表

Standard IUPAC: ヘリウム • Symbol: He • Atomic Mass: 4.002602 u

クイックファクトシート: ヘリウム (symbol He, atomic number 2) is element 2 on the periodic table of elements. It has a standard atomic weight of 4.002602 u and an electron configuration of 1s2. On the periodic table, ヘリウム is classified in period 1 and group Main.

1. Periodic Table Position of ヘリウム (2 on the Periodic Table)

Element ヘリウム has atomic number Z = 2, meaning it contains 2 protons in its atomic nucleus and 2 electrons in its neutral state. On the standard periodic table of elements, ヘリウム is located in period 1 and group Main.

2. Electron Configuration & Oxidation States (ヘリウム Charges & Configuration)

Full Electron Configuration: 1s2

Common Oxidation States (Charges): N/A

3. Physical Properties & Atomic Mass (ヘリウム Atomic Mass)

Element ヘリウム has a standard atomic weight of 4.002602 u. Its melting point is N/A K and boiling point is 4.22 K. The Pauling electronegativity value is N/A.

Comprehensive chemical properties and data for Helium (He, Z=2).

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

4. Related Elements in the Same Chemical Family

Ne (Z=10) Ar (Z=18) Kr (Z=36) Xe (Z=54) Rn (Z=86)

5. Frequently Asked Questions about ヘリウム (FAQ)

What is the chemical symbol and atomic number of ヘリウム?

The chemical symbol of ヘリウム is He and its atomic number is 2.

What is the atomic mass and electron configuration of ヘリウム?

ヘリウム has a standard atomic mass of 4.002602 u and ground-state electron configuration of 1s2.

What periodic table group and period does ヘリウム belong to?

ヘリウム is located in period 1 and group Main on the periodic table of elements.

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