85 At 아스타틴 210.0 u

아스타틴

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주기
6
족
17
블록
p-블록
상 (표준 상태)
Solid

아스타틴은 지구에서 자연 산출량이 가장 적은 원소이다. 어느 시점에나 지각에 약 25그램만 존재한다.

아스타틴 개요

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.

물리적 성질

원자 질량 210.0 u
표준 상태에서의 상 Solid

전자적 성질

전기 음성도 2.2

전자 배치

배치 [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁵

전자껍질 배치

아스타틴의 전자껍질 배치 At 2e⁻ 8e⁻ 18e⁻ 32e⁻ 18e⁻ 7e⁻
아스타틴의 전자껍질 구조 — 껍질별 전자 수.
껍질 전자
1 (K) 2
2 (L) 8
3 (M) 18
4 (N) 32
5 (O) 18
6 (P) 7

주기율표에서의 위치

주기율표에서 아스타틴의 위치 At

블록 & 주기

블록

s p d f

주기

1 2 3 4 5 6 7

주기율표

란타넘족 악티늄족

더 많은 할로겐

9 F 플루오린 17 Cl 염소 35 Br 브로민 53 I 아이오딘

Frequently Asked Questions

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