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प्रश्न
State the type of element for the following:
Arsenic
विकल्प
Metal
Non-metal
Metalloid
Noble gas
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उत्तर
Metalloid
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संबंधित प्रश्न
Give the names and symbols of five familiar substances which you think are elements.
What is the significance of the symbol of an element ? Explain with the help of an example.
If the symbol for Cobalt, Co, were written as CO, what would be wrong with it?
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 the type of element for the following:
Sulphur
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).
Hydroxide
What does the symbol '(l)' present in a chemical equation, mean?
The symbol of tungsten is _______.
Write the symbols for the following elements.
- Oxygen
- Gold
- Calcium
- Cadmium
- Iron
The first letter of a symbol is always written as a ______ letter and the second letter as a ______ letter.
