57 La 란타넘 138.91 u

란타넘

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주기
6
족
—
블록
f-블록
상 (표준 상태)
Solid

란타넘은 란타넘족의 첫 번째 원소이다. 카메라 렌즈, 촉매, 전지 전극에 쓰인다.

란타넘 개요

The first element of the lanthanide series, lanthanum (La) gives the entire family of rare earths its name, from the Greek for to lie hidden. Element 57 falls in period 6 of the f-block, with an atomic mass of 138.91, the electron configuration [Xe] 5d¹ 6s², and a low Pauling electronegativity of 1.1. A soft, silvery, reactive metal, it is used in high-refractive-index optical glass for camera and telescope lenses, as a catalyst in petroleum refining, and in the electrodes of nickel-metal-hydride batteries. Lanthanum is solid at standard conditions and typically adopts the +3 state shared across the series.

물리적 성질

원자 질량 138.91 u
표준 상태에서의 상 Solid

전자적 성질

전기 음성도 1.1

전자 배치

배치 [Xe] 5d¹ 6s²

전자껍질 배치

란타넘의 전자껍질 배치 La 2e⁻ 8e⁻ 18e⁻ 18e⁻ 9e⁻ 2e⁻
란타넘의 전자껍질 구조 — 껍질별 전자 수.
껍질 전자
1 (K) 2
2 (L) 8
3 (M) 18
4 (N) 18
5 (O) 9
6 (P) 2

주기율표에서의 위치

주기율표에서 란타넘의 위치 La

블록 & 주기

블록

s p d f

주기

1 2 3 4 5 6 7

주기율표

란타넘족 악티늄족

란타넘을(를) 포함하는 화합물

산화란타넘

La₂O₃

더 많은 란타넘족

58 Ce 세륨 59 Pr 프라세오디뮴 60 Nd 네오디뮴 61 Pm 프로메튬 62 Sm 사마륨 63 Eu 유로퓸 64 Gd 가돌리늄 65 Tb 터븀 66 Dy 디스프로슘 67 Ho 홀뮴

Frequently Asked Questions

What is 란타넘?
란타넘 (La) is a chemical element with atomic number 57. It is a solid at standard temperature and pressure, classified as a 란타넘족.
What are the key properties of 란타넘?
란타넘 has an atomic mass of 138.91 u.
What is the electron configuration of 란타넘?
The electron configuration of 란타넘 is [Xe] 5d1 6s2. It is in the f-block of the periodic table.
What is the electronegativity of 란타넘?
란타넘 has an electronegativity of 1.1 on the Pauling scale.