Introduction to hydrogen a metal or nonmetal:
Hydrogen is one of the important constituent in the earth. Although in the elemental form, it occurs in less abundant around 0.15% in the earch crust and in the combined form, it occurs as water in signifcant amount. Hydrogen is one of the lightest element so that only its abundance is low in the earth crust. It is found significanly in the sun atmosphere and some of the planets like Jupiter and Saturn have significant amount of hydrogen. Please express your views of this topic Aristotle Atomic Theory Contribution by commenting on blog.
Hydrogen is unique in that it contains only one proton and one electron which makes it very versatile. It can combine with almost all the elements in the periodic table. Hydrogen has atomic number 1 so it is the first element in the periodic table. So we know that in the periodic table the elements are arranged in the increasing order of atomic number and in a group the similar electronic configuration repeats. Thus hydrogen has electronic configuration of 1s1 which means it may be placed with alkali metals but it has one electron less than Helium which is inert gas so it can be placed with nonmetals that is halogens.
Here is the discussion of few properties of hydrogen which it exhibit both as metal and nonmetal.
Properties of hydrogen as alkali metal:
Hydrogen has electronic configuration 1s1. On one hand, its electronic configuration is similar to the outer electronic configuration (ns1) of alkali metals, which belong to the first group of the periodic table
Hydrogen has resemblance to alkali metals, which lose one electron to form unipositive ions, as well as with halogens, which gain one electron to form uninegative ion. For example Na forms Na+ and H also forms H+ which is considered as proton.
Like alkali metals, hydrogen forms oxides, halides and sulphides like H2O which is similar to Li2O and HCl and NaCl are comparable.
Having problem with Structural Formulas keep reading my upcoming posts, i will try to help you.
Properties similar to nonmetals (halogen):
Hydrogen is a gas as most of the halogens like chlorine and fluorine.
It is diatomic like F2, Cl2, Br2 and I2. All of them forms covalent single bond which is similar to hydrogen which also forms covalent single bond.
Like halogens (with ns2np5 configuration belonging to the seventeenth group of the periodic table), it is short by one electron to the corresponding noble gas configuration, helium (1s2).
In terms of ionization enthalpy, hydrogen resembles more with halogens, ΔH of Li is 520 kJ mol–1, F is 1680 kJ mol–1 and that of H is 1312 kJ mol–1.
Summary
So hydrogen has both metal and nonmetal properties which makes it unique. It may not be considered metal or non metal.
Hydrogen is one of the important constituent in the earth. Although in the elemental form, it occurs in less abundant around 0.15% in the earch crust and in the combined form, it occurs as water in signifcant amount. Hydrogen is one of the lightest element so that only its abundance is low in the earth crust. It is found significanly in the sun atmosphere and some of the planets like Jupiter and Saturn have significant amount of hydrogen. Please express your views of this topic Aristotle Atomic Theory Contribution by commenting on blog.
Hydrogen is unique in that it contains only one proton and one electron which makes it very versatile. It can combine with almost all the elements in the periodic table. Hydrogen has atomic number 1 so it is the first element in the periodic table. So we know that in the periodic table the elements are arranged in the increasing order of atomic number and in a group the similar electronic configuration repeats. Thus hydrogen has electronic configuration of 1s1 which means it may be placed with alkali metals but it has one electron less than Helium which is inert gas so it can be placed with nonmetals that is halogens.
Here is the discussion of few properties of hydrogen which it exhibit both as metal and nonmetal.
Properties of hydrogen as alkali metal:
Hydrogen has electronic configuration 1s1. On one hand, its electronic configuration is similar to the outer electronic configuration (ns1) of alkali metals, which belong to the first group of the periodic table
Hydrogen has resemblance to alkali metals, which lose one electron to form unipositive ions, as well as with halogens, which gain one electron to form uninegative ion. For example Na forms Na+ and H also forms H+ which is considered as proton.
Like alkali metals, hydrogen forms oxides, halides and sulphides like H2O which is similar to Li2O and HCl and NaCl are comparable.
Having problem with Structural Formulas keep reading my upcoming posts, i will try to help you.
Properties similar to nonmetals (halogen):
Hydrogen is a gas as most of the halogens like chlorine and fluorine.
It is diatomic like F2, Cl2, Br2 and I2. All of them forms covalent single bond which is similar to hydrogen which also forms covalent single bond.
Like halogens (with ns2np5 configuration belonging to the seventeenth group of the periodic table), it is short by one electron to the corresponding noble gas configuration, helium (1s2).
In terms of ionization enthalpy, hydrogen resembles more with halogens, ΔH of Li is 520 kJ mol–1, F is 1680 kJ mol–1 and that of H is 1312 kJ mol–1.
Summary
So hydrogen has both metal and nonmetal properties which makes it unique. It may not be considered metal or non metal.
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