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).

(c) On moving down a group, the number of valence electrons ....... (remains the same/increases/decreases).

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

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.

Choose the words which correctly completes the following statements:

The element below sodium in the same Group would be expected to have a (A) electronegativity than sodium and the element above chlorine would be expected to have a (B) ionization potential than chlorine.

Q.

Fill in the blanks with correct option.

1. Properties of element are periodic function of their _______ (atomic mass/ atomic number/ relative atomic mass).

2. The elements having same _______(electronic configuration/ number of valence electrons) are placed in the same group.

3. In the modern periodic table the elements placed below sodium are expected to have________(lower/ higher) electronegativity than sodium and the elements placed above chlorine are expected to have ______(lower/ higher) ionization energy than chlorine.

Q.

Choose the word or phrase from the brackets which correctly completes the following statement:

On moving from left to right in a given Period, the number of shells ___________________ (remains the same/increases/decreases).

Q. Consider the following statements:
(a) Elements in a group have the same number of valence electrons.
(b) Variation of atomic size along a period shows an erratic behaviour towards the end.
(c) Electro-positive character decreases on moving down a group.
(d) Electro-negative in a period increases right from the alkali metal to the inert gas element.
Which of the above statement(s) is/are correct?