Advertisements
Advertisements
प्रश्न
Explain the terms ‘chemical formula’.
Advertisements
उत्तर १
Chemical formula is a representation of a substance either element or compound by means of symbols.
उत्तर २
Chemical Formula: “A molecule of a substance element or compound could be represented by symbols. Representation known as chemical formula i.e. molecular formula of oxygen gas is O2 water H2O, hydrochloric acid HCl etc.
APPEARS IN
संबंधित प्रश्न
Two elements X and Y have valencies of 5 and 3, and 3 and 2, respectively. The elements X and Y are most likely to be respectively :
Define atomic mass unit. What is its symbol ?
The formula of the sulphate of an element M is M2(SO4)3
Write the formula of it
Chloride
The formula of the sulphate of an element M is M2(SO4)3
Write the formula of it
Phosphate
State which element exists in the highest percentage in earth’s crust.
Give the symbol of the following element:
Chlorine [chloride]
Give the symbol of the following element:
Lead
Give the symbol of the following element:
Sodium
State the type of element for the following:
Fluorine
State the type of element for the following:
Neon
Give the symbol of the following element:
Hydroxide
Write the radical of the following valency:
Sulphate
Write the chemical formula of the following:
calcium carbonate
Define the term ‘valency’.
Certain metal exhibit variable valencies which include valencies: 1+, 2+, 3+, and 4+.
State the variable valency of the following metal.
Mercury
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).
Oxide
______ of some elements are derived from Latin or Greek names of the elements.
What is the expansion of IUPAC.
Write a note on Greem symbols.
