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In the periodic table, the vertical colu...

In the periodic table, the vertical columns are called ______ (periods/groups)

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ICSE-PERIODIC PROPERTIES OF ELEMENTS -QUESTIONS FOR PRACTICE ( Fill in the blanks by using correct word/term given in the brackets and rewrite the complete sentence in your notebook.)
  1. Horizontal rows of periodic table are called

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  2. In the periodic table, the vertical columns are called (periods/group...

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  3. The number of electrons in the outermost shell of the atom of an eleme...

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  4. Period 1 contains elements. (two/eight)

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  5. The elements in a period have valencies. (same/different).

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  6. In the modern periodic table, elements are classified according to the...

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  7. Elements in the same group have chemical properties. (similar/differe...

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  8. As we move across a period from left to right, metallic character (de...

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  9. As we move across a period from left to right, nonmetallic character (...

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  10. The atomic size of lithium is than that of sodium. (greater/smaller).

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  11. Properties of the elements mainly depend on their . (electronic config...

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  12. Fluorine is electronegative than lithium. (more/less)

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  13. Atomic size decreases in a of the periodic table as the atomic number ...

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  14. In a group, the atomic size from top to bottom. (increases / decreases...

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  15. Ionisation energy decreases in a as atomic number increases. (group/p...

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  16. Ionisation energy of sodium is than that of potassium. (more/less)

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  17. If an element of period 2 has one electron in its outermost shell, the...

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  18. The element at the bottom of a group would be expected to show metalli...

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  19. Properties of the elements are a periodic function of their . (atomic...

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  20. The ionisation potential of potassium is ​that of sodium. (gt//lt)

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