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प्रश्न
The formula of the sulphate of an element M is M2(SO4)3
Write the formula of it
Chloride
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उत्तर
The valency of metal M is 3. So, the formulae are as follows:
Chloride - MCl3
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संबंधित प्रश्न
The formula of the sulphate of an element M is M2(SO4)3
Write the formula of its
Acetate
An atom of an element is denoted by a “symbol” Explain the meaning of the term ‘symbol’. State a reason for representing the following element by its symbol.
Copper by ‘Cu’
Match the noble gases – with their correct symbols:
| Noble gases | Symbols |
| (a) Helium | (1) Ar |
| (b) Neon | (2) Xe |
| (c) Argon | (3) Rn |
| (d) Krypton | (4) He |
| (e) Xenon | (5) Kr |
| (f) Radon | (6) Ne |
Select the correct answer from the choice given below.
The type of element-phosphorus
Write the radical of the following valency:
Potassium
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).
Iodide
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
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).
Phosphate
What does the symbol '(l)' present in a chemical equation, mean?
