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प्रश्न
‘The modern periodic table consists of elements arranged according to their increasing atomic numbers’. With reference to elements with atomic numbers 1 to 20 only in the periodic table – differentiate them into – metallic elements, metalloids, non-metals & noble gases.
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उत्तर
Names and symbols of metal, non-metals, metalloids, and noble – gases out of 1st 20 elements.
| Metal | Symbol | Non-metal | Symbol |
| Lithium | Li | Hydrogen | H |
| Beryllium | Be | Carbon | C |
| Sodium | Na | Nitrogen | N |
| Magnesium | Mg | Oxygen | O |
| Aluminium | Al | Fluorine | F |
| Potassium | K | Phosphorus | P |
| Calcium | Ca | Sulphur | S |
| Chlorine | Cl |
| Metalloids | Symbol | Noble gas | Symbol |
| Boron | B | Helium | He |
| Silicon | Si | Neon | Ne |
| Argon | Ar |
APPEARS IN
संबंधित प्रश्न
Define the term: Element
Differentiate between:
Homogenous and heterogenous substances
Write the Chemical Name of the Following and Also Give Their Molecular Formulae:
Vinegar
Answer the following question:
Give the advantages of using symbols instead of names of elements or compounds.
Give the name of the radical - NO3
Complete the statement given below by filling in the blank with the correct word.
The basic unit of an element is an __________.
Write the names of elements from the following symbol:
Cd
Write the names of elements from the following symbol:
Xe
Elements : Combine to form compounds :: Compounds : ______.
Give an example for the elements derived from their Latin names.
