In period 3 of 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
The element B would have (lower/ higher) metallic character than A
The element A would probably have (lesser/ higher) electron affinity than B
The element A would have (greater/ smaller) atomic size than B

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Solution

The element B would have a higher metallic character than A. Metallic character depends on the atomic size and less ionisation potential. So from left to right metallic character decreases.
The element A would probably have a higher electron affinity than B. Electron affinity increases from left to right to the periodic table
The element A would have a smaller atomic size than B. From left to right in a periodic table, atomic size decreases due to an increase in nuclear charge

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Similar 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.

Q. 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).

Q. 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).

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) electro-negativity than sodium and the element above chlorine 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).

(d) Metals are good ............. (oxidising agent/ reducing agent) because they are electron.......... (acceptors/donors).

Q. 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.

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