Chemistry
Arrange the following as per instructions given in the brackets.
(a) Mg, Cl, Na, S, Si (decreasing order of atomic size)
(b) Cs, Na, Li, K, Rb (increasing metallic character)
(c) Na, K, Cl, S, Si (increasing ionisation potential)
(d) Cl, F, Br, I (increasing electron affinity)
(e) Cs, Na, Li, K, Rb (decreasing electronegativity)
(f) K, Pb, Ca, Zn (increasing reactivity)
(g) Li, K, Na, H (decreasing order of their potential ionisation)
Periodic Table
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Answer
(a) Na > Mg > Si > S > Cl.
(b) Li < Na < K < Rb < Cs.
(c) K < Na < Si < S < Cl.
(d) I < Br < F* < Cl.
Flourine (F) in group 17 is an exception. It has lower electron affinity than Chlorine (Cl).
(e) Li > Na > K > Rb > Cs.
(f) Pb < Zn < Ca < K.
(g) H > Li > Na > K.
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Related Questions
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.
There are three elements E, F and G with atomic numbers 19, 8 and 17, respectively.
Classify the elements as metals and non-metals.
The electronegativities (according to Pauling) of the elements in Period 3 of the Periodic Table are as follows with the elements arranged in alphabetical order :
Al Cl Mg Na P S Si 1.5 3.0 1.2 0.9 2.1 2.5 1.8 Arrange the elements in the order in which they occur in the Periodic Table from left to right.
(The group 1 element first, followed by the group 2 element and so on, up to group 7).
Name : A metal present in period 3, group 1 of the periodic table.