CBSE Class 11 Chemistry Worksheet - Classification of Elements and Periodicity (3) CBSE,CCE and NCERT students can refer to the attached file. All educational material on the website has been prepared by the best teachers having more than 20 years of teaching experience in various schools. The study material available on our website for all CBSE classes and subjects have been prepared by teachers from all over the country. All study material has been carefully designed keeping into mind the latest CBSE examination trends.
Time: 30 min
Ch#3 : Classification of Elements and Periodicity in Properties -03
Full Marks: 20
1. All questions are compulsory.
2. Please give the explanation for the answer where applicable.
Q1 - Write the atomic number and name the two elements, which are named after the name of scientist. (2 Marks)
Q2 - How many blocks are there in modern periodic table? What is the basis of dividing periodic table in blocks? (2 Marks)
Q3 - Why the number of elements in first period is only two? (2 Marks)
Q4 - Define (i) Covalent radius (ii) van der Waals radius (iii) Metallic radius. (3 Marks)
Q5 -Arrange the following species in decreasing order of size. Give reasons also.
O2- , F-, Mg2+, Na+, N3- (3 Marks)
(a)Name the most stable conformer of ethane.
(b)Write the electronic configuration of following atoms/ions Cu , Ca2+, O2–, F– (5 Marks)
Q7 - Write the group numbers which are placed in p and d block elements in the modern periodic table. (1 Mark)
Q8 - Write the formula of compound which might be formed by the pair of aluminium and sulphur. (1 Mark)
Q9 - Write the IUPAC name of the following elements with atomic number:
(i) 103 (ii)110 (1 Mark)
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