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प्रश्न
Give the names and symbols of five familiar substances which you think are elements.
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उत्तर
The names of five familiar elements are:
- Oxygen: O
- Iron: Fe
- Gold: Au
- Silver: Ag
- Hydrogen: H
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संबंधित प्रश्न
State whether the following statement is true or false:
The symbol of element cobalt is CO.
Fill in the blank:
Dalton used symbol _____ for oxygen and _____ for hydrogen.
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 – radicals – with their correct combining power or capacity, (valency).
(a) OH
(b) So4
(c) No3
(d) Co3
Combining power or capacity – A : 3; B : 2; C : 1. (negative valencies)
State the type of element for the following:
potassium
Give the symbol of the following element:
Xenon
Write the radical of the following valency:
Chlorine [Chloride]
Write the radical of the following valency:
Sulphate
Select the correct answer to the statement given below:
An element present in the earth’s crust, atmosphere and the human body.
Name three metals whose symbols are derived from the first letter of the name of the element.
