Page 1 - WS-1

Class XII

PHYSICS

Chapter-13-NUCLEI

WORKSHEET-1

1.

2.

3.

4. The nuclear matter density is

a. inversely proportional to the mass number(A) of a nucleus.
b. independent on the mass number(A) of a nucleus.
c. directly proportional to the square of mass number(A) of a nucleus.
d. directly proportional to the cube of mass number(A) of a nucleus.

226
5. In 88Ra nucleus, there are

a. 138 protons and 88 neutrons
b. 138 neutrons and 88 protons
c. 226 protons and 88 electrons
d. 226 neutrons and 138 electrons

6. The volume of the nucleus having a mass number A is directly proportional to

1/3
a. A .
3
b. A .
c. A.
2
d. A .

7. If a particle is being added to the nucleus of an atom but not changing its chemical properties.
Then, these particles are

a. alpha particles
b. neutrons
c. protons
d. electrons