Hydrogen Element (Periodic Table)

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Hydrogen

Hydrogen (H) is a chemical element of the periodic table, located in the group 1 and the period 1, and is having the atomic number 1. It is a colorless, odorless, tasteless, highly combustible gas, whose name comes from the Greek word “hydro” and “genes”, which means water forming. It is a reactive nonmetal. It is the lightest element and is the tenth most abundant element on earth.

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
– s block

FAQs on Hydrogen Element

Hydrogen
‣ What does hydrogen look like?

Appearance: colorless gas
‣ Who discovered hydrogen? When was hydrogen discovered?

Discovery: Henry Cavendish (1766)
Named by: Antoine Lavoisier (1783)
‣ Where is hydrogen located on the periodic table?

Hydrogen Periodic Table

Location: Hydrogen is found in the first column of the periodic table above the lithium element.
‣ What is hydrogen’s atomic number?

Atomic number (Z): 1
‣ What is hydrogen symbol?

Symbol: H
‣ What is hydrogen’s atomic weight?

Standard atomic weight: [1.00784, 1.00811] conventional: 1.008
‣ What block is hydrogen in the periodic table?

Block: s-block
‣ What group does hydrogen belong to?

Group: 1 (hydrogen and alkali metals)
‣ What is hydrogen’s period number?

Period: 1
‣ What is the covalent radius of hydrogen?

Covalent radius: 31±5 pm
‣ Hydrogen Van der Waals radius: 120 pm
‣ What is hydrogen melting point?

Melting point: (H2) 13.99 K (-259.16 °C, -434.49 °F)
‣ What is hydrogen’s boiling point?

Boiling point: (H2) 20.271 K (-252.879 °C, -423.182 °F)
‣ Hydrogen critical point: 32.938 K, 1.2858 MPa
‣ Hydrogen triple point: 13.8033 K, 7.041 kPa
‣ How many electron shells does hydrogen have?

Electrons per shell: 1
‣ What is the ground state electron configuration for hydrogen?

Electron configuration: 1s1
‣ What is hydrogen ionization energy?

Ionization energies:1st: 1312.0 kJ/mol
‣ What phase of matter is hydrogen at room temperature?

Phase (at r.t): gas
‣ What is hydrogen density?

Density (at STP): 0.08988 g/L
when liquid (at m.p): 0.07 g/cm3 (solid: 0.0763 g/cm3)
when liquid (at b.p): 0.07099 g/cm3
‣ Hydrogen magnetic ordering: diamagnetic
‣ Hydrogen natural occurrence: primordial
‣ What is the oxidation state of hydrogen?

Oxidation state: +1
‣ What is the electronegativity value of hydrogen?

Electronegativity: Pauling scale: 2.20
‣ Hydrogen heat of fusion: (H2) 0.117 kJ/mol
‣ Hydrogen heat of vaporization: (H2) 0.904 kJ/mol
‣ Hydrogen molar heat capacity: (H2) 28.836 J/(mol K)
‣ Hydrogen molar magnetic susceptibility: -3.98 × 10-6 cm3/mol (298 K)
‣ Speed of sound in hydrogen: 1310 m/s (gas, 27 °C)
‣ What is the crystal structure of hydrogen?

Crystal structure: hexagonal
‣ Thermal conductivity of hydrogen: 0.1805 W/(m.K)
‣ Hydrogen CAS number:
12385-13-6
1333-74-0 (H2)

‣ Hydrogen vapor pressure

Vapor pressure
P (Pa)1101001 k10 k100 k
at T (K)1520

‣ How many hydrogen isotopes are there?

Main isotopes of hydrogen
IsotopeAbundanceHalf-life (t1/2)Decay modeProduct
1H99.98 %stable
2H0.02 %stable
3Htrace12.32 yβ–3He

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