Introduction
Let us discuss about the atomic size. According to modern the Atomic Theory, an atom is the minimum particle of an element which takes part in chemical reactions it maintains its identity all the way through every physical changes and chemical changes. Atoms of elements are quite reactive. They, therefore, normally do not exist in the free state except the atoms of noble or rare gases. Next we see the size of an atomic.
The atoms are generally declaring the building blocks of matter. They are very very small and do not be seen even by the majority of powerful microscope. An idea of the extremely small size of the atom can be had from the fact that 1cm of space can accommodate about 35,000,000 atoms arranged end to end in a line. The atomic radius is called as size of the atom is indicated by its radius. The atomic radius of the smallest atom, hydrogen is 0.37 x 10-10 m or 0.037 nm. The nm is normally declaring the nanometer.
The 1nm is normally declare the 1nm=10-9 m or 109 nm = 1 m. The small dimensions of hydrogen atom or atoms in general can be seen as compared with the size of some common objects given in the following table.
Let us discuss about the atomic size. According to modern the Atomic Theory, an atom is the minimum particle of an element which takes part in chemical reactions it maintains its identity all the way through every physical changes and chemical changes. Atoms of elements are quite reactive. They, therefore, normally do not exist in the free state except the atoms of noble or rare gases. Next we see the size of an atomic.
Atomic size
It has been found that the atoms of all elements are made up from three basic particles and that the atoms of different elements contain different numbers of these three particles. The particles are electron, proton and neutron. Since an atom has in general no charge, the many electrons external the nucleus is similar to the number of protons inside the nucleus. The even with microscope, they do not perceive them atoms are small.The atoms are generally declaring the building blocks of matter. They are very very small and do not be seen even by the majority of powerful microscope. An idea of the extremely small size of the atom can be had from the fact that 1cm of space can accommodate about 35,000,000 atoms arranged end to end in a line. The atomic radius is called as size of the atom is indicated by its radius. The atomic radius of the smallest atom, hydrogen is 0.37 x 10-10 m or 0.037 nm. The nm is normally declaring the nanometer.
The 1nm is normally declare the 1nm=10-9 m or 109 nm = 1 m. The small dimensions of hydrogen atom or atoms in general can be seen as compared with the size of some common objects given in the following table.
Relative sizes of some common objects
| Relative sizes | |
| Radii | Examples |
| 10-1 m 10-2 m 10-4 m 10-8 m 10-9 m 10-10 m | Watermelon Ant Grain of sand A molecule of haemoglobin A molecule of water An atom of hydrogen |
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