Advertisements
Advertisements
प्रश्न
What is meant by the symbol of an element ? Explain with examples.
Advertisements
उत्तर
The symbol of an element is either the first letter or the first and another letter of the English or Latin name of the element.
For example: Oxygen is represented by the symbol O. Similarly Iron, whose Latin name is Ferrum, is represented by the symbol Fe.
APPEARS IN
संबंधित प्रश्न
What is the significance of the formula of a substance ?
An element B shows valencies of 4 and 6. Write the formulae of its two oxides.
Give the formula and valency of:
chromate ………….…….. .
Write the formula of the following compound:
Sodium plumbite
Write the formula of the following compound:
Magnesium hydroxide
Write the formula of the following compound:
Zinc nitrate
Write the formula of the following compound:
Aluminium hydroxide
Write the formula of the following compound:
Copper [I] sulphide
Write the formula of the following compound:
Iron [III] oxide
Play a game for writing formula.
Example 2: A low-cost model for writing formulae: Take empty blister packs of medicines. Cut them in groups according to the valency of the element, as shown in the figure. Now, you can make formulae by fixing one type of ion into other.
For example:
The formula for sodium sulphate:
2 sodium ions can be fixed on one sulphate ion.
Hence, the formula will be Na2SO4.
Do it yourself:
Now, write the formula of sodium phosphate.
