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प्रश्न
State the type of element for the following:
Neon
पर्याय
Metal
Non-metal
Metalloid
Noble gas
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उत्तर
Noble gas
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संबंधित प्रश्न
Write true or false
Milk is an emulsion.
Give two examples of the following:
Solid + Liquid mixture
Match the metallic elements – with their correct symbols Metallic elements
| Metallic elements | Symbol |
| (a) Potassium | (1) Ca |
| (b) Sodium | (2) Zn |
| (c) Calcium | (3) Pb |
| (d) Magnesium | (4) Hg |
| (e) Zinc | (5) Cu |
| (f) Aluminum | (6) Au |
| (g) Iron | (7) K |
| (h) Lead | (8) Fe |
| (i) Copper | (9) Al |
| (j) Mercury | (10) Na |
| (k) Silver | (11) Mg |
| (l) Platinum | (12) Pt |
| (m) Gold | (13) Ag |
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)
Write the chemical formula of the following:
Sodium bromide
Write the chemical formula of the following:
calcium carbonate
Give the formula of the following gas:
Nitrogen
Select the correct answer to the statement given below:
An element present in the earth’s crust, atmosphere and the human body.
State a reason why the symbol of calcium is ‘Ca’ and of copper is ‘Cu’
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).
Sulphide
