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प्रश्न
Select the correct answer to the statement given below:
An element present in the earth’s crust, atmosphere and the human body.
विकल्प
Chalk
Oxygen
Silicon
Bromine
Nitrous oxide
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उत्तर
Oxygen
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संबंधित प्रश्न
Name the element used as a standard for atomic mass scale.
Give the names and symbols of five familiar substances which you think are elements.
The scientist who proposed the first letter (or first letter and another letter) of the Latin or English name of
an element as its symbol, was :
Define atomic mass unit. What is its symbol ?
What do the following symbol stand for?
H
State what a chemical formula denotes.
Give the symbol of the following element:
Calcium
State the type of element for the following:
Lead
Write the radical of the following valency:
Chlorine [Chloride]
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
