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प्रश्न
Assertion (A): Alkali metals do not form dipositive ions.
Reason (R): After loss of one electron alkali metals achieve a stable electronic configuration of noble gases.
पर्याय
Both A and R are true and R is the correct explanation of A
Both A and are true but R is not the correct explanation of A
A is true but R is false
A is false but R is true
उत्तर
Both A and R are true and R is the correct explanation of A
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संबंधित प्रश्न
Choose the correct answer from the choice given:
In the periodic table, alkali metals are placed in the group __________
Lithium, sodium, and potassium elements were put in one group on the basis of their similar properties. What are those similar properties?
What is the colour of the flame of sodium and potassium?
How the reaction can proceed continuously?
Match the Column A with Column B.
| Column A | Column B | ||
| (a) | Water | 1. | Lithium |
| (b) | Alkali metal | 2. | Iodine |
| (c) | Halogen | 3. | Covalent compound |
| (d) | Calcium oxide | 4. | Acetic acid |
| (e) | Weak acid | 5. | Ionic compound |
| 6. | Sulphuric acid | ||
In the periodic table alkali metals are placed in the group ______.
This question refers to the elements of the Periodic Table with atomic numbers from 3 to 18. Some of the elements are shown by letters, but the letters are not the usual symbols of the elements.
| 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| A | B | C | D | E | F | G | H |
| 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| I | J | K | L | M | N | O | P |
Which of these is an alkali metal?
