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प्रश्न
Define atomic mass unit. What is its symbol ?
उत्तर
Atomic mass unit can be defined as one twelfth (1/12) of the mass of an unbound atom of carbon-12. The atomic masses of all the elements are determined by comparing the mass of their atom with that of the carbon-12 atom.
Atomic mass unit = 1/12 the mass of a carbon-12 atom
(b) The symbol of atomic mass unit is “u”.
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संबंधित प्रश्न
Give two symbols which have been derived from the "English names" of the elements.
An atom of an element is denoted by a “symbol”. Explain the meaning of the term ‘symbol’. State a reason for representing the following element by its symbol.
Hydrogen by ‘H’
State the type of element for the following:
potassium
State the type of element for the following:
Carbon
State the type of element for the following:
Silicon
Give the symbol of the following element:
Sulphate
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
State whether the following ion or radical given below of a non-metallic element exhibits valency: 1–, 2– or 3–. (write the ion or radical with the correct valency).
Zincate
State whether the following ion or radical given below of a non-metallic element exhibits valency: 1–, 2– or 3–. (write the ion or radical with the correct valency).
Plumbite
Antimony has the highest tensile strength.
