# Hydrogen Element

Find elemental, thermodynamic, material, electromagnetic, atomic & nuclear properties of hydrogen element along with reactivity and abundance.

Sarah Taylor-

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Hydrogen is the first element in the periodic table. A periodic table contains 118 elements distributed in 7 rows and 18 columns. The rows are known as periods and the columns are the groups of the periodic table. The elements of the periodic table are arranged according to their atomic number.

## Basic elemental properties of Hydrogen atom

There are 118 different elements in the periodic table but there are some basic elemental properties of each. In a periodic table, elements with basic elemental properties are grouped together. Basic elemental properties of hydrogen are:

### Atomic Symbol of Hydrogen element

Every element in the periodic table has its atomic symbol or chemical symbol for representation. The atomic symbol of hydrogen is “H”

### Atomic Number of Hydrogen

Elements in the periodic table are arranged in groups and periods on the basis of their atomic number.

Atomic number is the number of protons present in the nucleus of an atom. The atomic number of Hydrogen is 1. This shows Hydrogen is the first element of the periodic table.

### Short Electronic Configuration of Hydrogen atom

Short Electronic Configuration of Hydrogen is 1s1

### Block of Hydrogen in Periodic Table

There are four blocks (s, p, d, f) in the periodic table. Hydrogen belongs to the s-block of the periodic table. S block is also the first block in the periodic table.

### Group of Hydrogen element in Periodic Table

Groups are the columns of the periodic table and Hydrogen belongs to the first group.

### Period of Hydrogen in Periodic Table

Periodic table is arranged in periods and groups. The rows going across left to right are periods and Hydrogen atom is placed in the first period. Elements that are present in a period share common properties .

### Atomic Mass of Hydrogen

Atomic mass is the mass of an atom and the atomic mass of hydrogen is 1.00784 u. If we round off the atomic mass of hydrogen to 3 decimal points, we get 1.008 u.

## Thermodynamic properties of Hydrogen

Thermodynamic properties are the characteristic features of a system, capable of specifying the system's state. The thermodynamic properties of an element include chemical, physical and thermal properties. The thermodynamic properties of Hydrogen element are:

### Phase at STP

Phase at STP is the state in which an element is present. The stp phase of Hydrogen is “Gas”.

### Melting Point of Hydrogen

Melting point is a temperature at which an element of substance changes its state from solid to liquid. The melting point of hydrogen gas is -259.14 °C.

### Boiling Point of Hydrogen element

A boiling point is a temperature at which an element of a substance starts turning into vapors. The boiling point of hydrogen gas is -252.87 °C.

### Critical Temperature of Hydrogen atom

A critical temperature is a point at which a gas cannot become liquid even if we are applying pressure. The critical temperature of hydrogen gas is 32.97 K.

### Critical Pressure of Hydrogen

The critical pressure required to liquefy a gas at its critical temperature. The critical pressure of hydrogen gas is 1.293 MPa.

### Molar Heat of Fusion of Hydrogen

Molar Heat of Fusion is the energy required to melt each mole of substance. The molar heat of fusion of hydrogen is 0.558 kJ/mol.

### Molar heat of Vaporization

The Molar heat of vaporization is the heat absorbed by the one specific mole of a substance. The molar heat of vaporization of hydrogen gas is 0.44936 kJ/mol or 0.452 kJ/mol.

### Specific heat at STP

The specific heat of hydrogen at STP is 14300 J(kgK).

### Adiabatic Index of Hydrogen element

The adiabatic index is the ratio of specific heats of pressure and constant volume. The adiabatic index of hydrogen is 7/5.

These are some of the main thermodynamic properties of hydrogen. Let’s find out all the material properties of Hydrogen.

## Material properties of Hydrogen atom

We have discussed basic elemental properties and thermodynamic properties of hydrogen gas. Besides these, there are many material properties of hydrogen as well. Some of the material properties include density, molar volume, refractive index and thermal conductivity.

### Density of Hydrogen

The density of hydrogen is 8.99x10-5 g/cm3

### Molar Volume of Hydrogen

The molar volume of hydrogen is 11200 cm3/mol

### Refractive Index of Hydrogen

The refractive Index of hydrogen is 1.000132

### Sound Speed of Hydrogen

The sound speed of hydrogen is 1270 m/s

### Thermal Conductivity of Hydrogen

The thermal conductivity of hydrogen is 0.1805 W/(mK)

These are the main material properties of hydrogen.

## Electromagnetic properties of Hydrogen

When there is any emission or absorption of electromagnetic radiations, a martial responds to these changes. All elements of a periodic table have electromagnetic properties. Some of the main electromagnetic properties of hydrogen gas include magnetic types, magnetic volume, mass magnetic susceptibility and color.

### Magnetic type of Hydrogen

The magnetic type hydrogen refers to the fact that it is diamagnetic.

### Volume Magnetic Susceptibility of Hydrogen

The volume magnetic susceptibility of hydrogen is -2.23 x 10-9

### Mass Magnetic Susceptibility of Hydrogen

The mass magnetic susceptibility of hydrogen is -2.48 x 10-8 m3 /kg

### Molar Magnetic Susceptibility of Hydrogen

The molar magnetic susceptibility of hydrogen gas is -4.999 x 10-11 m3 /mol

### Color of Hydrogen Gas

The hydrogen gas is invisible or colorless

These are some of the main electromagnetic properties of Hydrogen gas.

## Reactivity of Hydrogen

### Valency of Hydrogen

The valency of an element is a number that represents the ability of an atom to combine with other atoms. The valency of hydrogen is 1.

### Electronegativity of Hydrogen

Electronegativity of hydrogen is the tendency of its atom participating in a covalent bond to attract the bonding electrons. The electronegativity of hydrogen is 2.2

### Electron affinity of Hydrogen element

Electron affinity is the energy released when one electron is added to a neutral atom to form an anion. The electron affinity of hydrogen is 72.8 kJ/mol

### First ionization energy of Hydrogen

It is the energy to remove the outermost electron from the neutral atom in the gas phase. The first ionization energy of hydrogen is 1312 kJ/mol

## Atomic properties

The atomic properties of hydrogen atom have term symbol, atomic radius, covalent radius, van der waals radius.

Term Symbol of Hydrogen

The term symbol specifies the electronic state of an atom. The term symbol of hydrogen atom is 2S½.

### Atomic Radius of Hydrogen element

The total distance from an atom's nucleus to the outermost orbital of an electron is its atomic radius. The atomic radius of hydrogen is 25 pm.

Covalent radius is the measurement of an atom's size that forms one covalent bond. The covalent bond of hydrogen is 31 pm.

### Van der Waals Radius of Hydrogen

Van der waals radius is the measurement for the size of an atom that is not chemically bonded. The van der waals radius of hydrogen element is 120 pm.

## Abundances of Hydrogen

It is the measure that tells us about the percentage of which it is present.

### Abundance of hydrogen in the universe

The abundance of hydrogen in the universe is 75 mass %.

### Abundance of hydrogen in the solar system

The abundance of hydrogen in the solar system is 75 mass %.

### Abundance of hydrogen in the meteorites

The abundance of hydrogen in the meteorites is 2.4 mass %.

### Abundance of hydrogen in earth's crust

The abundance of hydrogen in earth's crust is 0.15 mass %.

### Abundance of hydrogen in ocean

The abundance of hydrogen in the ocean is 11 mass %.

### Abundance of hydrogen in humans

The abundance of hydrogen in humans is 10 mass %.

### Universe Molar Abundances of Hydrogen

The universe molar abundances of hydrogen is 93 mol %.

### Solar Molar Abundances of Hydrogen

The solar molar abundances of hydrogen is 93 mol %.

### Meteorite Molar Abundances of Hydrogen

The meteorite molar abundance of hydrogen is 17 mol %.

### Ocean Molar Abundances of Hydrogen

The ocean molar abundances of hydrogen is 66 mol %.

### Crust Molar Abundances of Hydrogen

The crust molar abundances of hydrogen is 3.1 mol %.

### Human Molar Abundances of Hydrogen

The human molar abundance of hydrogen is 62 mol %.

## Nuclear properties of Hydrogen

### Half life of Hydrogen

Half life is the time for the radioactivity of a specified isotope to fall to half its original value. The half Life of hydrogen is stable.

### Stable isotopes of Hydrogen

Stable isotopes of hydrogen are 1H (99.985%) | 2H (0.015%)

### Nuclear Spin of Hydrogen

Nuclear spin of hydrogen is 1H ½+ | 2H 1+

### Unstable isotopes of Hydrogen

Unstable isotopes of hydrogen is 3H (12.32 yr)

### Neutron Cross Section of Hydrogen

The neutron cross section of hydrogen is 0.332 b.

### Neutron Mass Absorption of Hydrogen

The neutron mass absorption of hydrogen is 0.011 m2 /kg.

## Identifiers of Hydrogen

### CAS Number of Hydrogen

The CAS number of hydrogen is 1333-74-0.

### PubChem CID number of Hydrogen

The PubChem CID number of hydrogen is 783.