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प्रश्न
Write the chemical formula of the following:
magnesium oxide
उत्तर
MgO
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संबंधित प्रश्न
Name the elements represented by the following symbols :
Hg, Pb, Au, Ag, Sn
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:
Fluorine
Give the symbol of the following element:
Sodium
State the type of element for the following:
Copper
Write the radical of the following valency:
Carbonate
State the valency of the following metallic element and write symbol with the valency
Zinc
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
Give the qualitative and quantitative meaning of the term ‘symbol’.
How many elements are known at present?
