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

1. EO4

2. E2O3

3. E3O2

4. EO

Subtopic:   Evolution of Periodic Table |
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An example of metalloid elements in the periodic table is:

1. Na and K 2. Cu and Al
3. As and Si 4. Ca and Mg
Subtopic:  Modern Periodic Table & Periodicity |
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Among the following elements, identify the one that is not an actinoid :
1. Curium (Z = 96)
2. Californium (Z = 98)
3. Uranium (Z = 92)
4. Terbium (Z = 65)
Subtopic:  Modern Periodic Table & Periodicity |
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Which of the following exhibits variable oxidation states?

1. Na 2. Cu
3. Mg 4. Al
Subtopic:  Modern Periodic Table & Periodicity |
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The outermost electronic configuration of the last element of the p-block in the 6th period is represented by:

1. 7s27p6

2. 5f146d107s27p0

3. 4f145d106s26p6

4. 4f145d106s26p4

Subtopic:  Modern Periodic Table & Periodicity |
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The following property/ies decrease from left to right across the periodic table and increase from top to bottom:

(i) Atomic radius (ii) Electronegativity (iii) Ionisation energy (iv) Metallic character

1. (i) only 2. (i), (ii), and (iii)
3. (i), (iii), and (iv) 4. (i), and (iv)
Subtopic:  Modern Periodic Table & Periodicity |
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The most non-metallic element among the given elements is

1. Be 2. B
3. Mg 4. Al
Subtopic:  Modern Periodic Table & Periodicity |
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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 .

Subtopic:  Modern Periodic Table & Periodicity |
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Which among the following is not a representative element?

1. Tellurium 2. Tantalum
3. Thallium 4. Astatine
Subtopic:  Modern Periodic Table & Periodicity |
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Match the element in Column I with that in Column II.

Column-I Column-II
(a) Copper (i) Non-metal
(b) Fluorine (ii) Transition metal
(c) Silicon (iii) Lanthanoid
(d) Cerium (iv) Metalloid
 
(a) (b) (c) (d)
1. (ii) (iv) (i) (iii)
2. (ii) (i) (iv) (iii)
3. (iv) (iii) (i) (ii)
4. (i) (ii) (iii) (iv)
Subtopic:  Modern Periodic Table & Periodicity | Electronic Configuration |
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