Oxygen Element (Periodic Table)

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Oxygen

Oxygen (O) is a chemical element of the periodic table, located in the group 16 and the period 2, and is having the atomic number 8. It is a colorless, odorless, tasteless gas, whose name comes from the Greek word “oxy genes”, which means acid forming. It is a reactive nonmetal and is the first most abundant element on earth. It is the first element in the chalcogen group.

group
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
period
1
 1
H
 2
He
2
 3
Li
 4
Be
 5
B
 6
C
 7
N
 8
O
 9
F
 10
Ne
3
 11
Na
 12
Mg
 13
Al
 14
Si
 15
P
 16
S
 17
Cl
 18
Ar
4
 19
K
 20
Ca
 21
Sc
 22
Ti
 23
V
 24
Cr
 25
Mn
 26
Fe
 27
Co
 28
Ni
 29
Cu
 30
Zn
 31
Ga
 32
Ge
 33
As
 34
Se
 35
Br
 36
Kr
5
 37
Rb
 38
Sr
 39
Y
 40
Zr
 41
Nb
 42
Mo
 43
Tc
 44
Ru
 45
Rh
 46
Pd
 47
Ag
 48
Cd
 49
In
 50
Sn
 51
Sb
 52
Te
 53
I
 54
Xe
6
 55
Cs
 56
Ba
 72
Hf
 73
Ta
 74
W
 75
Re
 76
Os
 77
Ir
 78
Pt
 79
Au
 80
Hg
 81
Tl
 82
Pb
 83
Bi
 84
Po
 85
At
 86
Rn
7
 87
Fr
 88
Ra
 104
Rf
 105
Db
 106
Sg
 107
Bh
 108
Hs
 109
Mt
 110
Ds
 111
Rg
 112
Cn
 113
Nh
 114
Fl
 115
Mc
 116
Lv
 117
Ts
 118
Og
57
La
 58
Ce
 59
Pr
 60
Nd
 61
Pm
 62
Sm
 63
Eu
 64
Gd
 65
Tb
 66
Dy
 67
Ho
 68
Er
 69
Tm
 70
Yb
 71
Lu
89
Ac
 90
Th
 91
Pa
 92
U
 93
Np
 94
Pu
 95
Am
 96
Cm
 97
Bk
 98
Cf
 99
Es
 100
Fm
 101
Md
 102
No
 103
Lr
– p block

FAQs on Oxygen Element

Oxygen
‣ What does oxygen look like?

Appearance: gas: colorless liquid and solid: pale blue
‣ When was oxygen discovered and by whom?

Discovery: Carl Wilhelm Scheele (1771)
Named by: Antoine Lavoisier (1777)
‣ Where is oxygen located on the periodic table?

Oxygen Periodic Table

Location: Oxygen is found in the second row of the periodic table, next to the nitrogen element.
‣ What is oxygen’s atomic number?

Atomic number (Z): 8
‣ What is oxygen’s symbol?

Symbol: O
‣ What is oxygen’s atomic weight?

Standard atomic weight: [15.99903 , 15.99977] conventional: 15.999
‣ What block is oxygen in the periodic table?

Block: p-block
‣ What group is oxygen in on the periodic table?

Group: 16 (chalcogens)
‣ What period is oxygen in on the periodic table?

Period: 8
‣ Oxygen covalent radius: 66±2 pm
‣ Oxygen Van der Waals radius: 152 pm
‣ What is oxygen’s melting point?

Melting point: (O2) 54.36 K (-218.79 °C, -361.82 °F)
‣ What is oxygen’s boiling point?

Boiling point: (O2) 90.188 K (-182.962 °C, -297.332 °F)
‣ Oxygen critical point: 154.581 K, 5.043 MPa
‣ Oxygen triple point: 54.631 K, 0.1463 kPa
‣ How many electron shells does oxygen have?

Electrons per shell: 2, 6
‣ What is oxygen’s electron configuration?

Electron configuration: [He] 2s2 2p4
‣ What are the allotropes of oxygen?

Allotropes: O2 (dioxygen), O3 (ozone), O4 (tetraoxygen), metallic oxygen
‣ What is oxygen ionization energy?

Ionization energies:
1st: 1313.9 kJ/mol
2nd: 3388.3 kJ/mol
3rd: 5300.5 kJ/mol
‣ What is oxygen’s phase at room temperature?

Phase (at r.t): gas
‣ What is oxygen’s density?

Density (at STP): 1.429 g/L
when liquid (at b.p): 1.141 g/cm3
‣ Oxygen magnetic ordering: paramagnetic
‣ Oxygen natural occurrence: primordial
‣ What is oxygen oxidation state?

Oxidation state: -2
‣ What is oxygen’s electronegativity?

Electronegativity: Pauling scale: 3.44
‣ Oxygen heat of fusion: (O2) 0.444 kJ/mol
‣ Oxygen heat of vaporization: (O2) 6.82 kJ/mol
‣ Oxygen molar heat capacity: (O2) 29.378 J/(mol K)
‣ Oxygen molar magnetic susceptibility: +3449.0 × 10-6 cm3/mol (293 K)
‣ Speed of sound in oxygen: 330 m/s (gas, at 27 °C)
‣ What is the crystal structure of oxygen?

Crystal structure: cubic
‣ Thermal conductivity of oxygen: 26.58 × 10-3 W/(m.K)
‣ Oxygen CAS number: 7782-44-7

‣ Oxygen vapor pressure

Vapor pressure
P (Pa)1101001 k10 k100 k
at T (K)617390

‣ How many isotopes does oxygen have?

Main isotopes of oxygen
IsotopeAbundanceHalf-life (t1/2)Decay modeProduct
16O99.76 %stable
17O0.04 %stable
18O0.20 %stable

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