Name the following.
i. Shortest period in the modern periodic table.
ii. Block which is placed separately at the bottom of the modern periodic table.
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Shortest period — i) 7 , Longest period — ii) 1
C) a →ii, b → iv, c → i, d → iii
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How many s – block and p block elements are there in the third period of the periodic table ?
Correct option is D) 2, 6
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The longest period in the modern periodic table is
Correct option is B) 6th
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Give reason: First period in the modern periodic table contains only two elements.
Elements present in the first period i.e., H and He contain only one shell which is also their valence shell and can accommodate maximum two electrons. As first shell can accommodate only...
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Write names and electronic configurations of elements of first period in the modern periodic table. Identify which of them has the stable complete
Hydrogen (H) : 1s2, Helium (He) : 2s2 Since helium has a complete duplet i.e., two electrons in its valence shell, it has the stable complete electronic configuration.
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Explain how does the filling of electrons takes place in the modern periodic table across: i. Second period ii. Third period
i. Filling of electrons in the second period: In the second period, electrons are filled in the second shell i.e., n = 2. This shell can accommodate a maximum of eight electrons...
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There are total 10 groups in the d-block of the modern periodic table. Explain.
The d-block in the modem periodic table is formed as a result of filling the last electron in d orbital. As there are five orbitals in a d subshell, 10 electrons...
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Explain the composition of the p-block in the modern periodic table.
The p-block contains elements of groups 13 to 18. It contains all the three types of elements i.e., metals, nonmetals and metalloids. In the p-block, metals and nonmetals are separated from each...
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What do you mean by s-block elements? Where are they placed in the modern periodic table?
Elements of group 1 and group 2 in which the last electron enters into ‘ns’ subshell are s-block elements. The s-block elements are placed on the extreme left in the modem...
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How could the Modern periodic table remove various anomalies of Mendeleev’s periodic table?
The Modern periodic table removed various anomalies of Mendeleev’s periodic table as follows: i. All isotopes of the same element have different atomic masses but same atomic number. Therefore, they occupy...
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