33 As Arsenic 74,922 u

Arsenic

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Periode
4
Golongan
15
Blok
p-blok
Fase (STP)
Solid

Arsenic is a metalloid known since antiquity, historically notorious as a poison. It is used in semiconductors and wood preservatives.

Penampilan: Metallic grey

About Arsenic

Known since antiquity and historically notorious as a poison, arsenic is a metallic-grey metalloid of atomic number 33 and atomic mass 74.922. It is a brittle solid with a density of 5.73 g/cm³. Five valence electrons ([Ar] 3d10 4s2 4p3) give an electronegativity of 2.18 and a first ionization energy of 947 kJ/mol. Albertus Magnus is credited with describing the element around 1250. Despite its toxicity, arsenic has practical uses in semiconductors and, historically, in wood preservatives. It sits in group 15, period 4, sharing that group with nitrogen and phosphorus.

Sifat Fisika

Massa Atom 74.922 u
Kerapatan 5.727 g/cm³
Titik Lebur 816.9 °C
Titik Didih 613.9 °C
Fase pada STP Solid
Jari-jari Atom 114.0 pm

Sifat Elektronik

Keelektronegatifan 2.18
Energi Ionisasi 947.0 eV
Afinitas Elektron 78.2 eV
Elektron Valensi 5

Konfigurasi Elektron

Konfigurasi [Ar] 3d¹⁰ 4s² 4p³

Electron Shell Configuration

Arsenic electron shell configuration As 2e⁻ 8e⁻ 18e⁻ 5e⁻
Electron shell structure of Arsenic — electrons per shell.
Shell Electrons
1 (K) 2
2 (L) 8
3 (M) 18
4 (N) 5

Position in Periodic Table

Arsenic position in the periodic table As

Penemuan

Ditemukan oleh: Albertus Magnus
Tahun: 1250

Blok & Periode

Blok

s p d f

Periode

1 2 3 4 5 6 7

Tabel Periodik

Lantanida Aktinida

Compounds Containing Arsenic

Gallium Arsenide

GaAs

Arsine

AsH₃

Lebih banyak Metaloid

5 B Boron 14 Si Silicon 32 Ge Germanium 51 Sb Antimony 52 Te Tellurium

Frequently Asked Questions

What is Arsenic?
Arsenic (As) is a chemical element with atomic number 33. It is a solid at standard temperature and pressure, classified as a metaloid.
What are the key properties of Arsenic?
Arsenic has an atomic mass of 74.922 u, density of 5.727 g/cm³, melting point of 816.9°C, boiling point of 613.9°C.
What is the electron configuration of Arsenic?
The electron configuration of Arsenic is [Ar] 3d10 4s2 4p3. It is in the p-block of the periodic table.
Who discovered Arsenic?
Arsenic was discovered by Albertus Magnus in 1250.
What is the electronegativity of Arsenic?
Arsenic has an electronegativity of 2.18 on the Pauling scale.