Solve
Guides
0
You visited us 0 times! Enjoying our articles? Unlock Full Access!
Standard XII
Chemistry
Chemical Reactivity
Question

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 of complete the following statement.
(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.

Open in App
Solution
Verified by Toppr

(i) The element B would have higher metallic character than A
(ii) The element A would probably have higher electron affinity than B
(iii) The element A would have smaller atomic size than B.
This is because as we move left to right in any period of periodic table the metallic character increases and electron affinity becomes more and more positive. Also, atomic size decreases along the period as we move left to right.

Was this answer helpful?
13
Similar Questions
Q1
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 of complete the following statement.
(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.
View Solution
Q2
Copy and complete the following sentences choosing the correct word or words from those given in the brackets, at the end of each sentence:
(1) The properties of the elements are a periodic function of their _________ (atomic number, mass number, relative atomic mass).
(2) Moving across a ________ of the periodic table, the elements show increasing _______ character (group, period, metallic, non-metallic).
(3) The element at the bottom of a group would be expected to show ________ metallic character than the element at the top (less, more).
(4) The similarities in the properties of elements belonging to a group is because they have the same _________ (electronic configurations, number of outer electrons, atomic number).
View Solution
Q3
The electronegativities (according to Pauling) of the elements in period 3 of the periodic table are as follows. The elements are 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
(i) Arrange the elements in the order in which they occur in the periodic table from left to right. (The group 1 elements first, followed by the group 2 element and so on, up to group 7.)
(ii) Choose the word or phrase from the brackets which correctly completes each of the following statements:
(a) The element below sodium in the same group would be expected to have a _________ (lower/higher) electronegativity than sodium and the element above chlorine which would be expected to have a ________ (lower/higher) ionization potential than chlorine.
(b) On moving from left to right in a given period, the number of shells _________ (remains the same/increases/decreases).
(c) On moving down a group, the number of valence electrons __________ (remains the same/increases/decreases).
View Solution
Q4
A, B, C are three elements in which B is an inert gas other than helium. With this information complete the following table.
Element

 Atomic
number
 No. of electrons
in the valence
shell		 Group to which
the element
belongs
A
B
C		 Z − 1
Z
Z + 1		 ....
....
....		 ....
....
....
Also, explain the following:
(i) Electron affinity of element A is more than that of element C.
(ii) Ionization energy of element C is less than that of element A.
(iii) Electron affinity of B is zero.
View Solution
Q5

Question 48 (c)
(a) Electropositive nature of the element(s) increases down the group and decreases across the period
(b) Electronegativity of the element decreases down the group and increases across the period
(c) Atomic size increases down the group and decreases across a period (left to right)
(d) Metallic character increases down the group and decreases across a period.
On the basis of the above trends of the Periodic Table, answer the following about the elements with atomic numbers 3 to 9.

Name the element with smallest atomic size.
View Solution