SSC Paper SCIENCE Maharashtra Board
Q.1.Fill in the Blanks (3)
1. Halogens
belong to group ______ in modern periodic table.
2. The
second period contains ________ elements
3. Elements
showing properties of both metals and non metals are called as _________.
Q.2.True or False (2)
1. Period
number 5 is an incomplete period.
2. There
are 7 periods in modern periodic table.
Q.3.Answer the following(Any
Five) (10)
1. Write
any two merits of Mendleev’s periodic table.
2. Give
Reason : Metallic character decreases from left to right in a periodic table.
3. State
any two demerits of Mendeleev’s periodic table.
4. Distinguish
between normal and transition elements.
5. Give
Reason : Atomic size increases down the group.
6. Write
any two merit of modern periodic table over Mendeleev’s periodic table.
Q.4. Describe the four blocs
of modern periodic table. (5)