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Chapter 3 – Periodic table and Periodicity of Properties Multiple Questions and Answers.
| 6. | 4th and 5th period of the long form of periodic table are called | ||
| A. | short periods | ||
| B. | Normal periods | ||
| C. | Long periods | ||
| D. | Very long periods | ||
| 7. | The atomic number of potassium is: | ||
| A. | 11 | ||
| B. | 15 | ||
| C. | 18 | ||
| D. | 19 | ||
| 8. | Which one of the following halogen has lowest electronegative? | ||
| A. | fluorine | ||
| B. | chlorine | ||
| C. | bromine | ||
| D. | iodine | ||
| 9. | The amount of energy given out when an electron is added to any atom is called: | ||
| A. | lattice energy | ||
| B. | ionization energy | ||
| C. | electronegative | ||
| D. | electron affinity | ||
| 10. | Which of following does not belong to p-block? | ||
| A. | IIIA | ||
| B. | IVA | ||
| C. | VA | ||
| D. | VIB | ||
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