Q4 of 75 Page 55

Why the symbols of few elements, like sodium, do not start with the initial letter of the name?

The symbols of a few elements like sodium do not start with the initial letter of the name because their symbol was derived from their names in Latin.

For example:


i. The symbol of sodium (Na) was derived from its latin name “natrium”


ii. The symbol of potassium (K) was derived from its latin name “kalium”


iii. The symbol of iron (Fe) was derived from its latin name “ferrum”


More from this chapter

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2

What is wrong with the following symbols? Give the correct symbol in each case.

(i) Sodium (So)


(ii) Hydrogen (Hg)


(iii) Copper (Co)


(iv) Sulphur (S)


(v) Calcium (CA)

 3

Name any two elements whose symbols do not start with the same letter as that of the name of the element.

 5

What is the difference between 2 Cl and Cl2? Which one of these two forms exist in nature? Also, give the atomic mass of this element.

 6

Write the atomicity of the following:

(i) I2 (ii) H2S


(iii) HNO3 (iv) Na2SO4


(v) S8