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प्रश्न
State the valency of the following metallic element and write symbol with the valency
Potassium
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उत्तर
Metals have positive valency 1, 2 or 3,
| Element | Symbol | Valency |
| Potassium | \[\ce{K}\] | \[\ce{K^1+}\] |
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संबंधित प्रश्न
Write the names and symbols of the first twenty elements that you have studied in class VI & VII.
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’
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
State which element exists in the highest percentage in earth’s crust.
State the type of element for the following:
Fluorine
State the type of element for the following:
Xenon
Give the formula of the following gas:
Sulphur dioxide
State whether the following ion or radical given below of a non-metallic element exhibits valency: 1–, 2– or 3–. (write the ion or radical with the correct valency).
Iodide
State whether the following ion or radical given below of a non-metallic element exhibits valency: 1–, 2– or 3–. (write the ion or radical with the correct valency).
Permanganate
Name the elements with the following symbols.
- Na
- W
- Ba
- Al
- U
