1. In long form of periodic table, elements are arranged in tabular form following
2. The aim of periodic classification of elements is:
3. In the periodic table, noble gases are found at the end of:
4. Mendeleev’s periodic table failed to:
5. Lothar Meyer studied the
6. Number of electron in the valence shell of an atom is represented by:
7. Elements placed in the same group possess same ________ properties.
8. Along a period, number of electron in the valence shell of atom:
9. Lother Mayer studied the relationship between atomic weights of elements and their ________ properties.
10. __________ provided fundamental basis for the classification of elements.
11. The arrangement of elements in Mendeleev’s Periodic table was done in _____ direction.
12. Mendeleev’s Periodic table helped to ________.
13. The modern periodic table is based in the ________ order of atomic numbers.
14. Elements placed in the same period have same number of _______.
15. Noble gases are ______ elements.
16. _______ are called rare earth elements.
17. According to Mendeleev’s Periodic Law, the properties of elements depend on their ________.
18. Law of Octaves lost its importance due to the discovery of ______.Law of Octaves lost its importance due to the discovery of ______.
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