Chemistry 9 Chapter 3Periodic Table and Periodicity of Properties - 6

Chemistry 9 Chapter 3
Periodic Table and Periodicity of Properties - 6

1. Mendeleev developed a classification scheme of elements in?

a) 1869
b) 1964
c) 1864
d) 1969

2. How many elements have been arranged by Mendeleev in periods and groups?

a) 50
b) 65
c) 24
d) 60

3. Magnessium is present in group?

a) IIIA
b) IVA
c) IA
d) IIA

4. Neon is present in period number?

a) 1
b) 3
c) 2
d) 4

5. The n value of the valence shell of an element indicates its?

a) period
b) group
c) family
d) none of these

6. The total number of electrons in the valence shells of an element represents its?

a) none of these
b) both of these
c) period number
d) group number

7. The valence shell of Boron contains 2 electrons, it must be present in ___ period?

a) 3rd
b) 4th
c) 2nd
d) 1st

8. How many electrons are present in the valence shell of Aluminium if its atomic number is 13?

a) 2
b) 13
c) 3
d) 7

9. The total number of electrons in the valence shell of magnesium is 2, so it must be present in group?

a) IIA
b) IVA
c) VA
d) IIIA

10. An element with electronic configuration 1s² 2s² is placed in the group?

a) VA
b) VIIA
c) IIA
d) IA

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