The formula for the oxide formed by Eka-aluminum is:

1. ${\mathrm{EO}}_4$

2. ${\mathrm{E}}_2{\mathrm{O}}_3$

3. ${\mathrm{E}}_3{\mathrm{O}}_2$

4. EO

An example of metalloid elements in the periodic table is:

Which of the following exhibits variable oxidation states?

Which of the following represents the valence shell electronic configuration of the last element of p-block, located in the 6th period?

1. $7{\mathrm{s}}^{2}7{\mathrm{p}}^6$

2. $5{\mathrm{f}}^{14}6{\mathrm{d}}^{10}7{\mathrm{s}}^{2}7{\mathrm{p}}^0$

3. $4{\mathrm{f}}^{14}5{\mathrm{d}}^{10}6{\mathrm{s}}^{2}6{\mathrm{p}}^6$

4. $4{\mathrm{f}}^{14}5{\mathrm{d}}^{10}6{\mathrm{s}}^{2}6{\mathrm{p}}^4$

Consider the following periodic properties:

(i) Atomic radius
(ii) Electronegativity
(iii) Ionisation energy
(iv) Metallic character
Which of these properties decrease from left to right across a period and increase from top to bottom down a group?

The most non-metallic element among the given elements is

An element whose IUPAC name is Ununtrium (Uut) belongs to:

1. s-Block elements                       

2. p-Block elements

3. d-Block elements                              

4. Inner transition elements .

Match Column-I with Column-II.