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प्रश्न
Give the qualitative and quantitative meaning of the term ‘symbol’.
उत्तर
Qualitative meaning: C is the symbol of an atom of the element carbon
S is the symbol of the atom of element sulphur.
This means symbols stand for a specific element.
No two elements can have the same symbol.
Quantitative meaning: A symbol also represents the quantity of the element i.e. atomic mass of the element. Symbol C represents 12 g of carbon. In other words how many times that element is heavier than `1/12` th C12
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संबंधित प्रश्न
Define: Elements-
The atoms of which of the following pair of elements are most likely to exist in free state ?
The anion of an element has :
State what a chemical formula denotes.
Give the symbol and the number of atoms of the following elements present in zinc chloride.
Match the formulas of the following of bases with their correct names.
Bases – (a) NaOH (b) KOH (c) Ca(OH)2 (d) Zn(OH)2
Names – (1) Potassium hydroxide (2) Zinc hydroxide (3) Aluminium hydroxide (4) Calcium hydroxide (5) Sodium hydroxide
State the type of element for the following:
Silicon
Write the radical of the following valency:
Bromine [Bromide]
Give the formula of the following acid:
Hydrochloric
Certain metal exhibit variable valencies which include valencies: 1+, 2+, 3+, and 4+.
State the variable valency of the following metal.
Iron
write symbol with the variable valency