Aluminium

Aluminium [Al] – Element Details, History, Atomic Structure, Facts, Properties, Electronic Configuration, Atomic Spectrum, Uses.

Aluminium Symbol

Aluminium

Aluminium is the 13th Element of Periodic table with atomic number 13, atomic weight 26.981538 , symbol Al, has a Face Centered Cubic structure and Silver color. Aluminium is a post-transition metal element. Trivial name of Aluminium is triels, icosagens. Know everything about Aluminium Facts, Physical Properties, Chemical Properties, Electronic configuration, Atomic and Crystal Structure.

aluminium element

History of Aluminium

The element Aluminium was discovered by None in year 1825 in Denmark . Aluminium derived its name from alumina, a compound (originally aluminum)

Aluminium (or aluminum; see different endings) is a chemical element in the boron group with symbol Al and atomic number 13. It is a silvery-white, soft, nonmagnetic, ductile metal. Aluminium is the third most abundant element (after oxygen and silicon), and the most abundant metal, in the Earth’s crust.

How to Locate Aluminium on Periodic Table

Periodic table is arranged by atomic number, number of protons in the nucleus which is same as number of electrons. The atomic number increases from left to right. Periodic table starts at top left ( Atomic number 1) and ends at bottom right (atomic number 118). Therefore you can directly look for atomic number 13 to find Aluminium on periodic table.

Another way to read periodic table and locate an element is by using group number (column) and period number (row). To locate Aluminium on periodic table look for cross section of group 13 and period 3 in the modern periodic table

Aluminium Facts

Name
Aluminium
Atomic Symbol
Al
Atomic Number
13
Phase
Solid
Atomic Weight
26.981538
Colour
Silver
Classification
post-transition metal
Group in Periodic Table
13
Group Name
boron family
Block in Periodic Table
p-block
Period in Periodic Table
3
Electronic Configuration
[Ne] 3s2 3p1
Melting Point
660.32 °C
Boiling Point
2519 °C
Electronic Shell Structure
[2, 8, 3]
CAS Number
CAS7429-90-5

Aluminium Atomic Structure and Orbital Properties

Aluminium atoms have 13 electrons and the electronic shell structure is [2, 8, 3] with Atomic Term Symbol (Quantum Numbers) 2P1/2.

aluminium atomic structure
Aluminium Isotopes

Element Properties

Atomic Number
13
Number of Protons
13
Mass Number
27
Number of Neutrons
13
Shell structure (Electrons per energy level)
[2, 8, 3]
Electron Configuration
[Ne] 3s2 3p1
Valence Electrons
3s2 3p1
Oxidation State
-2;-1 1;2;3
Atomic Term Symbol (Quantum Numbers)

2P1/2

Atomic Structure of Aluminium

Atomic Radius
118 pm (1.18 Å)
Atomic Volume
9.99316222222 cm33
Covalent Radius
118 pm (1.18 Å)
Van der Waals Radius
N/A
Neutron Cross Section
0.233 σa/barns

Ground State Electronic Configuration of Aluminium - neutral Aluminium atom

The ground state electronic configuration of Neutral Aluminium atom is [Ne] 3s2 3p1. The portion of Aluminium configuration that is equivalent to the noble gas of the preceding period, is abbreviated as [Ne]. For atoms with many electrons, this notation can become lengthy and so an abbreviated notation is used.This is important as it is the Valence electrons 3s2 3p1, electrons in the outermost shell that determine the chemical properties of the element.

Unabbreviated electronic configuration of neutral Aluminium

Complete ground state electronic configuration for the Aluminium atom, Unabbreviated electronic configuration

1s2 2s2 2p6 3s2 3p1

Atomic Spectrum of Aluminium

Regulatory and Health - Health and Safety Parameters and Guidelines

CAS Number
CAS7429-90-5
RTECS Number
RTECSBD0330000
EU Number
EU231-954-8
DOT Hazard Class
4.3
DOT Numbers
1396
NFPA Fire Rating
1
NFPA Hazards
N/A
Autoignition Point
400 °C
NFPA Health Rating
0
NFPA Reactivity Rating
1
Flashpoint
645 °C

Aluminium Chemical Properties : Aluminium Ionization Energies and electron affinity

ElectronAffinity
42.5 kJ/mol
Valence
3
Electronegativity
1.61

Use of Aluminium

Aluminium is used in a huge variety of products including cans, foils, kitchen utensils, window frames, beer kegs and aeroplane parts. Since Aluminium  is cheap and light weight, so it is also  used in jewelry, everyday items, eyeglass frames, optical instruments, tableware etc.

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