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प्रश्न
Give a reason why elements are tabulated in a table called the ‘Periodic table’.
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उत्तर
For arranging all the elements in a systematic and simple manner. The arrangement of elements was done in the form of a table called Periodic Table in which elements are arranged in increasing order of their atomic numbers. Elements in the Periodic Table are arranged in Horizontal rows called Periods and vertical columns called groups. Metallic elements are placed on the left non-metallic on the right and noble gases on the extreme right of the Periodic table.
संबंधित प्रश्न
The English name of an element is potassium, its Latin name will be :
Write the full form of IUPAC. Name the elements represented by the following symbols:
Au, Pb, Sn, Hg
The formula of the sulphate of an element M is M2(SO4)3
Write the formula of its
Acetate
Give two examples of the following:
Liquid + Liquid mixture:
Give three reasons why – carbon dioxide is considered a compound, while carbon – an element.
Write the radical of the following valency:
Carbonate
State the valency of the following metallic element and write symbol with the valency
Calcium
Certain metal exhibit variable valencies which include valencies: 1+, 2+, 3+, and 4+.
State the variable valency of the following metal.
Tin
write symbol with the variable valency
Name three metals whose symbols are derived from the first letter of the name of the element.
______ of some elements are derived from Latin or Greek names of the elements.
