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प्रश्न
Write the radical of the following valency:
Hydroxide
विकल्प
1+
2+
3+
1−
2−
3−
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उत्तर
1−
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संबंधित प्रश्न
Out of ozone, phosphorus, sulphur and krypton, the elements having the lowest and highest atomicities are respectively :
The formula of the sulphate of an element M is M2(SO4)3
Write the formula of it
Chloride
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’
Give a reason why elements are tabulated in a table called the ‘Periodic table’.
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)
Write the formula of the compound formed – given symbols and combining power or capacity (valency) of the following element in the compound.
Ca2+ NO31-
Give the symbol of the following element:
Copper
State the type of element for the following:
Calcium
Give the symbol of the following element:
Carbonate
State the valency of the following metallic element and write symbol with the valency
Sodium
