TEST - 25 ( Classification of Elements- The Periodic Table )

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EFFORTS NEVER FAIL

NAME : *

1. Newlands relation is called *

1 point

Musical Law

Law of Octaves

Periodic Law

Atomic Mass Law

2. Upto which element, the Law of Octaves was found applicable? *

1 point

Oxygen

Calcium

Cobalt

Potassium

3. In Mendeleev’s Periodic Table, gaps were left for the elements to be discovered later. Which of the following elements found a place in the Periodic Table later? *

1 point

Chlorine

Silicon

Oxygen

Germanium

4. At the time of Mendeleev, the number of elements known was *

1 point

5. properties of eka-aluminium predicted by Mendeleev are the same as the properties of later discovered element: *

1 point

Scandium

Germanium

Gallium

Aluminium

6. An atom of an element has the electronic confi-guration 2,8,2. To which group does it belong? *

1 point

4th group

6th group

3rd group

2nd group

7. The arrangement of elements in the Modem Periodic Table is based on their *

1 point

increasing atomic mass in the period

increasing atomic number in the horizontal rows

increasing atomic number in the vertical columns

increasing atomic mass in the group

8. Where would you locate the element with electronic configuration 2, 8 in the Modern Periodic Table? *

1 point

Group 8

Group 2

Group 18

Group 10

9. Element ‘X’ forms a chloride with the formula XCl2, which is a solid with high melting point. X would most likely be in the same group of the periodic table as: *

1 point

10Which of these belong to the same period? *

1 point

A, B

B, C

C, A

A, B and C

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