Oxygen Element (Periodic Table)

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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