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प्रश्न
Name the element used as a standard for atomic mass scale.
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उत्तर
Carbon is used as a standard in the atomic mass scale.
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संबंधित प्रश्न
Write the names and symbols of the first twenty elements that you have studied in class VI & VII.
What do you understand by :
Noble gases
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 :
Give a reason why elements are tabulated in a table called the ‘Periodic table’.
Select the correct answer from the choice given below.
The symbol of mercury is
State the type of element for the following:
Chlorine
Certain metal exhibit variable valencies which include valencies: 1+, 2+, 3+, and 4+.
State the variable valency of the following metal.
Iron
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).
Hydroxide
Name the elements with the following symbols.
- Na
- W
- Ba
- Al
- U
Antimony has the highest tensile strength.
