Wednesday 31 December 2014
Sunday 28 December 2014
Atomic Hydrogen
Atomic Hydrogen
Introduction
Molecular hydrogen is di-atomic
and requires 104 kilo – calories per mole for its decomposition. The hydrogen
obtained during this decomposition is called as “Atomic Hydrogen”. The life
period of atomic hydrogen is 1/3rd of the second. i.e. two atoms of
hydrogen quickly combine and form molecular hydrogen . it was first detected
by “wood” in 1920 during the study of
hydrogen spectra.
Definition:
Hydrogen obtained by
decomposition of molecular hydrogen during heating is called as atomic-hydrogen
Properties of Tritium:
Properties of Tritium:
It is super heavy isotope of
hydrogen.
Its symbol is H3.
Its alternate symbol is T
It is unstable isotope of
hydrogen or radioactive isotope and has half life of 12.5 years.
It occurs in negligible quantities i.e naturally
occurring hydrogen contain
4.o x 10-15% of this
isotopes.
Its contain 1 electron, 1 proton,
2 Neutron.
Its nucleus contain 2 neutron.
Its atomic number is 1 and atomic
mass is 3
Its nucleus is called as Triton
Its structure is given below.
Properties of Deuterium;
Properties of Deuterium;
It is heavy
isotope of hydrogen and called as heavy hydrogen.
Its symbol is ‘H2’
Its alternate
symbol is D
It is stable
isopote of hydrogen
It occurs in
small quantities i.e naturally occurring hydrogen contains 0.0156% of this
isotope.
It contains 1
electron, 1 proton and 1 neotron
Its nucleus
contains 1 neutron
Its atomic
number is 1 and atomic mass is 2.
Its nucleus is
called as Deuteron.
Its structure is given below. i.e
Properties of Protium
Properties of Protium
1 it is light isotope of
hydrogen and known as occurring hydrogen.
2 its symbol is ‘H’
its alternate symbol is
P.
it is stable isotope of
hydrogen.
it occurs in large
quantities i-e naturally occurring hydrogen contain 99.98% of this isotopes
6 it contains 1 electron
and one proton but no neutron
7 its nucleus contains no
neutron.
8 its atomic number is 1
and atomic mass is also 1.
9 its nucleus is called
as “proton”.
1 its structure is given
below
Introduction about Physics
Def:
Physics is often described as the study of matter and energy.and how they affect each other over time and through space. Physicists ask the fundamental questions how did the universe begin.
Physics is often described as the study of matter and energy.and how they affect each other over time and through space. Physicists ask the fundamental questions how did the universe begin.
Isotops of Hydrogen
(i) Introduction:
isotopes first of all detected by J.J Thomson in 1912-13 during the study of properties of neon. Most of the elements are mixture of several isotopes. Isotopes of hydrogen are given special names i-e protium, deuterium and tritium.
(ii) Definition:
isotopes first of all detected by J.J Thomson in 1912-13 during the study of properties of neon. Most of the elements are mixture of several isotopes. Isotopes of hydrogen are given special names i-e protium, deuterium and tritium.
(ii) Definition:
Atoms of same element having same atomic number but different atomic masses.
OR
Atoms having same numbers of protons but different number of neutrons.
(iii) Type of Isotopes:
1. Protium.
2. Deuterium.
3. Tritium.
Hydrogen introduction
Hydrogen
Introduction:
First of all discovered by Cavendish in 1766 and named as “inflammable gas” (catches fire easily). This gas produced water with oxygen, hence in 1781 Cavendish named as “water producer gas”. Finally in the 1783 Lavoisier named as “HYDROGEN” (where hydro =water+gas=producer.)Introducation of Chemistry
This is an introductory course for students with limited background in chemistry; chemical problem solving will be emphasized with the goal of preparing students for further study in chemistry
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