You all have studied periodic table in class X consisting of elements arranged in horizontal
rows and vertical columns according to their properties. Now its time to explore these
elements more and gather extra information. Segregate all these elements into four
categories:-
1) Industrially important elements
2) Elements important in medical field.
3) Elements important for country’s defence.
4) Elements important in polymer industry.
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The following table includes 36 of the geologically important elements, listed alphabetically by their element name, along with their atomic number and the atomic mass of their most stable isotope.
The geologically most important elements are bolded, and the eight main elements of silicate minerals are identified with an asterisk (*).
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- Avogadro's number is a proportion that relates molar mass on an atomic scale to physical mass on a human scale. Avogadro's number is defined as the number of elementary particles (molecules, atoms, compounds, etc.) per mole of a substance. It is equal to 6.022×1023 mol-1 and is expressed as the symbol NA.
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