95 Am 아메리슘 243.0 u

아메리슘

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주기
7
족
—
블록
f-블록
상 (표준 상태)
Solid

아메리슘은 가정용 화재감지기에 들어 있는 인공 방사성 원소이다. Am-241이 방출하는 알파 입자가 공기를 이온화해 연기를 감지한다.

아메리슘 개요

Millions of household smoke detectors contain a fraction of a gram of americium, making this synthetic actinide one of the few artificially produced elements in routine domestic use. Its atomic number is 95 and its relative atomic mass 243.0, with the configuration [Rn] 5f7 7s2 marking a half-filled 5f subshell, and its electronegativity is 1.3. The metal is solid under standard conditions. The detector application rests on a specific decay mode: americium-241 emits alpha particles that ionise the air inside a small chamber, producing a steady current that smoke particles interrupt. Because the alpha radiation is stopped by a short distance of air, the sealed source presents little hazard while the device remains intact.

물리적 성질

원자 질량 243.0 u
표준 상태에서의 상 Solid

전자적 성질

전기 음성도 1.3

전자 배치

배치 [Rn] 5f⁷ 7s²

전자껍질 배치

아메리슘의 전자껍질 배치 Am 2e⁻ 8e⁻ 18e⁻ 32e⁻ 25e⁻ 8e⁻ 2e⁻
아메리슘의 전자껍질 구조 — 껍질별 전자 수.
껍질 전자
1 (K) 2
2 (L) 8
3 (M) 18
4 (N) 32
5 (O) 25
6 (P) 8
7 (Q) 2

주기율표에서의 위치

주기율표에서 아메리슘의 위치 Am

블록 & 주기

블록

s p d f

주기

1 2 3 4 5 6 7

주기율표

란타넘족 악티늄족

Am가 포함된 반응

아메리슘-241의 알파 붕괴

²⁴¹Am → ²³⁷Np + ⁴He

핵

더 많은 악티늄족

89 Ac 악티늄 90 Th 토륨 91 Pa 프로트악티늄 92 U 우라늄 93 Np 넵투늄 94 Pu 플루토늄 96 Cm 퀴륨 97 Bk 버클륨 98 Cf 캘리포늄 99 Es 아인슈타이늄

Frequently Asked Questions

What is 아메리슘?
아메리슘 (Am) is a chemical element with atomic number 95. It is a solid at standard temperature and pressure, classified as a 악티늄족.
What are the key properties of 아메리슘?
아메리슘 has an atomic mass of 243.0 u.
What is the electron configuration of 아메리슘?
The electron configuration of 아메리슘 is [Rn] 5f7 7s2. It is in the f-block of the periodic table.
What is the electronegativity of 아메리슘?
아메리슘 has an electronegativity of 1.3 on the Pauling scale.