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प्रश्न
Match the symbols of – radicals – with their correct combining power or capacity, (valency).
(a) OH
(b) So4
(c) No3
(d) Co3
Combining power or capacity – A : 3; B : 2; C : 1. (negative valencies)
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उत्तर
(a) OH — Valency- 1 (C)
(b) So4 — Valency- 2 (B)
(c) No3 — Valency- 1 (C)
(d) Co3 — Valency- 2 (B)
संबंधित प्रश्न
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 :
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’
Give a reason why elements are tabulated in a table called the ‘Periodic table’.
State which element exists in the highest percentage in earth’s crust.
State the type of element for the following:
Aluminium
Give the formula of the following acid:
Sulphuric
Give the formula of the following gas:
Nitrous oxide
State the valency of the following metallic element and write symbol with the valency
Potassium
State the valency of the following metallic element and write symbol with the valency
Aluminium
What is the rarest natural element on the earth?
