85 At Astatine 210.0 u

Astatine

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คาบ
6
หมู่
17
บล็อก
p-บล็อก
สถานะ (STP)
Solid

Astatine is the rarest naturally occurring element on Earth. Only about 25 grams exist in the crust at any time.

About Astatine

No element occurs less abundantly in nature than astatine. Estimates place the total quantity present in the crust at roughly 25 grams at any given moment, the whole of it produced continuously by the decay of heavier nuclides. Astatine holds atomic number 85 and a relative atomic mass of 210.0, and its [Xe] 4f14 5d10 6s2 6p5 configuration makes it the heaviest halogen in group 17 of period 6. The Pauling electronegativity is 2.2, the lowest of the halogens, and the element is a solid at standard conditions rather than the volatile species its lighter relatives form. Because samples large enough to see have never been assembled, much of what is known about astatine chemistry rests on tracer-scale experiments.

คุณสมบัติทางกายภาพ

มวลอะตอม 210.0 u
สถานะที่ STP Solid

คุณสมบัติทางอิเล็กทรอนิกส์

อิเล็กโทรเนกาติวิตี 2.2

การจัดเรียงอิเล็กตรอน

การกำหนดค่า [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁵

Electron Shell Configuration

Astatine electron shell configuration At 2e⁻ 8e⁻ 18e⁻ 32e⁻ 18e⁻ 7e⁻
Electron shell structure of Astatine — electrons per shell.
Shell Electrons
1 (K) 2
2 (L) 8
3 (M) 18
4 (N) 32
5 (O) 18
6 (P) 7

Position in Periodic Table

Astatine position in the periodic table At

บล็อกและคาบ

บล็อก

s p d f

คาบ

1 2 3 4 5 6 7

ตารางธาตุ

แลนทาไนด์ แอกทิไนด์

แฮโลเจน เพิ่มเติม

9 F Fluorine 17 Cl Chlorine 35 Br Bromine 53 I Iodine

Frequently Asked Questions

What is Astatine?
Astatine (At) is a chemical element with atomic number 85. It is a solid at standard temperature and pressure, classified as a แฮโลเจน.
What are the key properties of Astatine?
Astatine has an atomic mass of 210.0 u.
What is the electron configuration of Astatine?
The electron configuration of Astatine is [Xe] 4f14 5d10 6s2 6p5. It is in the p-block of the periodic table.
What is the electronegativity of Astatine?
Astatine has an electronegativity of 2.2 on the Pauling scale.