Practice free Classification of elements and Periodicity in properties (Chemistry) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
What is the IUPAC symbol for the element with the temporary name Unnilennium?
According to Table 3.5 of the NCERT text, the IUPAC symbol for Unnilennium (atomic number 109) is 'Une'. The symbols are derived from the first letter of each root: un (U), nil (n), enn (e).
Mendelevium is the official IUPAC name for an element. What was its temporary IUPAC name?
Table 3.5 lists Mendelevium as the official name with atomic number 101, and its IUPAC temporary name is Unnilunium. The component roots are 'un' for 1, 'nil' for 0, and 'un' for 1.
Consider the element with atomic number 110. Its temporary IUPAC name is Ununnillium. What is its corresponding official IUPAC name?
According to Table 3.5, the element with atomic number 110 has the temporary IUPAC name Ununnillium and the official IUPAC name Darmstadtium.
Which of the following elements correctly matches its temporary IUPAC name with the root 'sept'?
From Table 3.4, 'sept' corresponds to the digit 7. Looking at the options and Table 3.5, Ununseptium has an atomic number of 117, where the last digit '7' is represented by 'sept'.
The IUPAC temporary name for the element with Z=118 is Ununoctium. Which scientist's name is honored in its official IUPAC name?
Table 3.5 shows that the official IUPAC name for element 118 (Ununoctium) is Oganesson, named after Yuri Oganessian.
If an element's temporary IUPAC name is Ununquadium, its symbol would be:
For Ununquadium, the digits are 1, 1, 4. The roots are 'un', 'un', 'quad'. The IUPAC symbol is formed by taking the first letter of each root, so 'Uuq' (from Table 3.5).
What is the primary reason for IUPAC to recommend a systematic nomenclature for elements with Z > 100 before their discovery is officially proved?
The NCERT text states: 'To avoid such problems, the IUPAC has made recommendation that until a new element’s discovery is proved, and its name is officially recognised, a systematic nomenclature be derived directly from the atomic number of the element... For example, both American and Soviet scientists claimed credit for discovering element 104...'
Which of the following is the correct temporary IUPAC name for the element with atomic number 115?
Atomic number 115 breaks down into 1 (un), 1 (un), 5 (pent). Combining these roots and adding 'ium' gives Ununpentium (Table 3.5).
The abbreviation for the numerical root 'enn' in IUPAC nomenclature is:
Table 3.4 clearly states that for the digit 9, the name is 'enn' and the abbreviation is 'e'.
The temporary IUPAC name given to element 102 was Unnilbium. What is its official IUPAC name?
From Table 3.5, the element with atomic number 102 has the temporary IUPAC name Unnilbium and the official IUPAC name Nobelium.
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