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प्रश्न
Write the radical of the following valency:
Carbonate
विकल्प
1+
2+
3+
1−
2−
3−
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उत्तर
2−
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संबंधित प्रश्न
Write the names of following elements Na, C, Kr, U, Ra, Fe, Co.
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 the symbol and the number of atoms of the following elements present in sodium chloride.
Match the formulas of the following gases with their correct names :
Gases - (a) H2 (b) N2 (c) O2 (d) Cl2 (e) HCI (f) NH3 (g) CO (h) CO2 (i) SO2 (j) NO (k) NO2.
Names:
(1) Ammonia (2) Nitrogen Dioxide (3) Oxygen (4) Hydrogen (5) Nitrogen (6) Chlorine (7) Carbon Monoxide (8) Sulphur Dioxide (9) Nitrogen Monoxide (10) Carbon Dioxide (11) Hydrogen Chloride
Elements are mainly classified into metals and non-metals. State six properties of metals which differ from non-metals.
State the type of element for the following:
Copper
Give the formula of the following acid:
Sulphuric
Give the formula of the following gas:
Carbon monoxide
Fill in the blank with the correct word from the options given below:
A symbol represents a short form of a / an ________.
The pictorial symbol for water given by the alchemists was
