The electronic configuration which contain metals, non metals & metalloid is................
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Classification of elements and Periodicity in properties MCQs for NEET — Chemistry Questions with Answers
Practice free Classification of elements and Periodicity in properties (Chemistry) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
The group in which all the three physical states (solid ,liquid, gas) are observed is
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Explanation
Group 17 elements, also known as halogens, exhibit all three physical states at room temperature. Fluorine (F) and chlorine (Cl) are gases, bromine (Br) is a liquid, and iodine (I) is a solid.
The element with highest electronic affinity belongs to
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The atomic no. of B = atomic of A+18 , Statements A & B to
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Explanation
If the atomic number of element B is 18 more than that of element A, they belong to the same group but different periods. This is because they have similar valence electron configurations but are in different principal energy levels.
Element B occupies 3rd pd & gp 16 . Element C occupies 4 pd & gp 3. The molecular formula of compound formed between B & C is
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Choose the correct statement w.r.t oxidising property of F
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Explanation
Fluorine (F) is the strongest oxidizing agent because it has the highest electronegativity of all elements, which means it has a very strong tendency to attract electrons towards itself. This makes it very effective in oxidizing other substances.
The name of the scientist who dis covered the element Unu & its accepted IUPAC name is—
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Which of the following property does not indicate the periodicity of elements
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Explanation
The neutron/proton ratio does not exhibit periodicity in the same way as the other properties. Ionization potential, bonding behavior, and electronegativity all show trends across periods and down groups in the periodic table, but the neutron/proton ratio does not follow a periodic pattern.
Properties of Li are similar to Mg because
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Explanation
Lithium (Li) and Magnesium (Mg) have similar properties due to the diagonal relationship in the periodic table. This happens because the size by charge ratio (charge density) of Li and Mg is similar, leading to comparable chemical properties.
From the given set of quantum numbers for the last electron of the atom, choose the element which is a non metal. The set of Quantum numbers of A, B, C & D are given below (A) $ n = 2 , l = 1 , m = 0 , \pm 1$ (B) n = 4 , l = 0 , m = 0 (C) n = 5 , l = 2 , m = \pm 2 $ (D) n = 6 , l = 3 , m = 0
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Explanation
The given quantum numbers for option A correspond to an electron in a p-orbital (n=2, l=1). Elements with their last electron in a p-orbital in the second energy level are non-metals, like carbon (C) and nitrogen (N), which are found in the p-block of the periodic table.
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