Chemistry
Fill in the blanks by selecting the correct word from the brackets :
(a) The element below sodium in the same group would be expected to have a …………… (lower/higher) electro-negativity than sodium and the element above chlorine would be expected to have a (lower/higher) ionization potential than chlorine.
(b) On moving down a group, the number of valence electrons …………… (remains the same/increases/ decreases).
(c) Metals are good …………… (oxidising agent/ reducing agent) because they are electron …………… (acceptors/donors).
(d) Down the group, electron affinity …………… [increases, decreases, remains same].
(e) Electronegativity across the period …………… [increases/ decreases].
(f) Non-metallic character down the group …………… [increases/ decreases].
(g) In a period, increase in electron affinity increases …………… (oxidation/reduction).
(h) On descending a group, …………… (increase/decrease) in ionisation potential as well as electron affinity …………… (increases/decreases) oxidising capacity.
(i) If an element has a low ionization energy then it is likely to be …………… (metallic/non metallic).
(j) If an element has seven electrons in its outermost shell then it is likely to have the …………… (largest/smallest) atomic size among all the elements in the same period.
Periodic Table
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Answer
(a) The element below sodium in the same group would be expected to have a lower (lower/higher) electro-negativity than sodium and the element above chlorine would be expected to have a higher (lower/higher) ionization potential than chlorine.
(b) On moving down a group, the number of valence electrons remains the same (remains the same/increases/ decreases).
(c) Metals are good reducing agent (oxidising agent/ reducing agent) because they are electron donors (acceptors/donors).
(d) Down the group, electron affinity decreases [increases, decreases, remains same].
(e) Electronegativity across the period increases [increases/ decreases].
(f) Non-metallic character down the group decreases [increases/ decreases].
(g) In a period, increase in electron affinity increases reduction (oxidation/reduction).
(h) On descending a group, decrease (increase/decrease) in ionisation potential as well as electron affinity decreases (increases/decreases) oxidising capacity.
(i) If an element has a low ionization energy then it is likely to be metallic (metallic/non metallic).
(j) If an element has seven electrons in its outermost shell then it is likely to have the smallest (largest/smallest) atomic size among all the elements in the same period.
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Related Questions
Assertion (A): Atomic size increases along a period.
Reason (R): Effective nuclear charge increases with atomic number.
- Both A and R are true and R is the correct explanation of A.
- Both A and R 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.
Assertion (A): Elements in the same vertical column have similar properties.
Reason (R): Properties depend upon the number of electrons in the valence shell.
- Both A and R are true and R is the correct explanation of A.
- Both A and R 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.
Rewrite the following sentences by using the correct symbol > (greater than) or < (less than) in the blanks given :
(i) The ionization potential of potassium is ………. that of sodium.
(ii) The electronegativity of iodine is ………. that of chlorine.
In Period 3 of the Periodic Table, element B is placed to the left of element A. On the basis of this information, choose the correct word from the brackets to complete the following statements:
(i) The element B would have (lower/higher) metallic character than A.
(ii) The element A would probably have (lesser/higher) electron affinity than B.
(iii) The element A would have (greater/smaller) atomic size than B.