The correct statement among the following is:
 
1. Lothar Meyer plotted the physical properties against the atomic number and obtained a periodically repeated pattern.
2. French geologist, Chancourtois made a cylindrical table of elements to display the periodic recurrence of properties. 
3. Mendeleev realized that some of the elements did not fit in with his scheme of classification if the order of atomic number was strictly followed. 
4. Seaborg was awarded the Nobel Prize in chemistry for his work and Element 101 has been named Seaborgium (Sg) in his honour.




Subtopic:   Evolution of Periodic Table | Modern Periodic Table & Periodicity |
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The elements in which electrons are progressively filled in 4f-orbitals are called:

1. Actinoids 2. Transition elements
3. Lanthanoids 4. Halogens
Subtopic:  Modern Periodic Table & Periodicity |
 77%
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Among the following sequences, the sequence contains atomic numbers of only representative elements is/are-

(a) 3, 33, 53, 87 (b) 2, 10 ,22, 36
(c) 7, 17, 25, 37, 48 (d) 9, 35, 51, 88

Choose the correct option

1. (a), (d) 2. (b), (c)
3. (c), (d) 4. (b), (d)
Subtopic:  Modern Periodic Table & Periodicity |
 67%
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The IUPAC name of an element with atomic number 119 is:
1. ununoctium  2. ununennium 
3. unnilennium  4. unununnium
Subtopic:  Modern Periodic Table & Periodicity |
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The electronic configuration of Palladium is:

1. [Rn] 5f3 6d1 7s2

2. [Rn] 5f5 6d1 7s2

3. [Rn] 5f6d1 7s2

4. None of the above.

Subtopic:  Modern Periodic Table & Periodicity | Electronic Configuration |
 61%
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Statement A: The elements Z = 117 belongs to chalcogen family and the electronic configuration would be [Rn] 5f146d107s27p4
Statement B: The element with Z = 120 belongs to Group 2 (alkaline earth metals), and the electronic configuration would be [Uuo]8s2


The correct option is-

1. Statement A is correct, B is wrong.
2. Statement A is wrong, B is correct
3. Both A and B are wrong.
4. Both A and B are correct




 

Subtopic:  Modern Periodic Table & Periodicity |
 64%
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The correct increasing order of metallic character among' the following elements is:

Si, Be, Mg, Na, P

1. P < Si < Be < Mg = Na.

2. P < Si > Be < Mg < Na

3. P > Si > Be >Mg > Na

4. P < Si < Be < Mg < Na.

Subtopic:  Modern Periodic Table & Periodicity |
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A metalloid among the following is:

1.  Sc
2.  Pb
3.  Bi
4.  Te
Subtopic:  Modern Periodic Table & Periodicity |
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If an atom has electronic configuration 1s22s22p63s23p63d34s2, we will place it in group number:

1. Fifth 2. Fifteenth
3. Second 4. Third
Subtopic:  Electronic Configuration |
 65%
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AIPMT - 2002
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The element having electronic configuration [Kr]4d104f14, 5s25p6, 6s2 belongs to:

1. s-block

2. p-block

3. d-block

4. f-block

Subtopic:  Electronic Configuration |
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