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प्रश्न
State the type of element for the following:
Radon
विकल्प
Metal
Non-metal
Metalloid
Noble gas
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उत्तर
Noble gas
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संबंधित प्रश्न
Explain the significance of the symbol H.
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 :
Out of ozone, phosphorus, sulphur and krypton, the elements having the lowest and highest atomicities are respectively :
Match the symbols of metallic elements – with their correct combining power or capacity.
(a) K
(b) Zn
(c) Al
(d) Na
(e) Ca
Combining power or capacity – A : 3 ; B : 2 ; C : 1. (positive valencies)
Match the formulas of the following of acids with their correct names:
Acids – (a) HCI (b) HNO3 (c) H2SO4 (d) H2CO3
Names – (1) Carbonic acid (2) Sulphuric acid (3) Hydrochloric acid (4) Nitric acid
Give the symbol of the following element:
Boron
State the type of element for the following:
Sulphur
State the type of element for the following:
Copper
State the type of element for the following:
Chlorine
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
