Question

State the significance of symbol.​

Answer 1

Significance of a symbol :

1. It represents name of the element .
2. One atom of the element .
3. A definite mass of the element equal to atomic mass expressed in grams .

For example the symbol N stands for :

1. The element nitrogen .
2. One atom of Nitrogen .
3. 14 grams of Nitrogen this weight being the atomic weight of the element .

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Answer 2

The second, symbol s, is the SI unit of time. It is defined by taking the fixed numerical value of the caesium frequency Cs. , the unperturbed ground-state hyperfine transition frequency of the caesium-133 atom, to be 9 192 631 770 when expressed in the unit Hz, which is equal to s–1.