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प्रश्न
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
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उत्तर
| Name | Symbol | Ion | Valency |
| Oxide | \[\ce{O}\] | \[\ce{O^{2-}}\] | −2 |
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संबंधित प्रश्न
Give two symbols which have been derived from the " Latin names" of the elements.
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.
Hydrogen by ‘H’
Match the symbols of non-metallic elements with their correct combining power or capacity.
(a) O
(b) S
(c) Cl
Combining power or capacity A : 3; B : 2; C : 1. (negative valencies)
Give the symbol of the following element:
Bromine [bromide]
State the type of element for the following:
Carbon
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
Complete the statement given below by filling in the blanks with the correct words.
From the elements – He, Br, Pt and O; the element which forms a polyatomic molecule is ________ and which is liquid at room temperature is ________.
What does the symbol '→' present in a chemical equation, mean?
Describe the different ways in which we can write the symbols of elements. Give appropriate examples.
How many elements are known at present?
