Elements NDA Questions

NDA Chemistry

Elements MCQ Questions


13.
What is the electronic configuration of an element with atomic number 35 (Bromine)?
A.
[Ar] 3d¹⁰ 4s² 4p⁵
B.
[Ne] 3s² 3p⁵
C.
[Ar] 3d¹⁰ 4s² 4p³
D.
[Kr] 5s² 5p⁵
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ANSWER :
A. [Ar] 3d¹⁰ 4s² 4p⁵
14.
The IUPAC system for naming elements with atomic number greater than 100 uses numerical roots. What is the IUPAC name for element with Z = 117?
A.
Oganesson (Og)
B.
Moscovium (Mc)
C.
Livermorium (Lv)
D.
Tennessine (Ts) — formerly Ununseptium (Uus)
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ANSWER :
D. Tennessine (Ts) — formerly Ununseptium (Uus)
15.
s-block elements are placed in which groups of the periodic table?
A.
Groups 1, 2 and 3
B.
Groups 13 to 18
C.
Groups 3 to 12
D.
Groups 1 and 2
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ANSWER :
D. Groups 1 and 2
16.
p-block elements are placed in which groups of the modern periodic table?
A.
Groups 3 to 12
B.
Groups 1 and 2
C.
Groups 13 to 18
D.
Groups 1 to 12
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ANSWER :
C. Groups 13 to 18
17.
The d-block elements (transition metals) occupy which groups?
A.
Groups 1 and 2
B.
Groups 1 to 18
C.
Groups 13 to 18
D.
Groups 3 to 12
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ANSWER :
D. Groups 3 to 12
18.
f-block elements (lanthanides and actinides) are placed in the periodic table:
A.
In Groups 1 and 2
B.
Within Groups 3 to 12 alongside d-block
C.
In Groups 13 to 18 alongside p-block
D.
Below the main table in two separate series (Periods 6 and 7), as inner transition elements
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ANSWER :
D. Below the main table in two separate series (Periods 6 and 7), as inner transition elements