4.

is a negatively charged particle:
is a negatively charged particle
5.
Is the same as a helium nucleus:
Is the same as a helium nucleus
6.
Is pure energy:
Is pure energy
7.
Increases the atom number by 1:
Increases the atom number by 1
8.
Has no effect on the atomic number:
Has no effect on the atomic number
9.
Decreases the atomic number by 2:
Decreases the atomic number by 2

match these definitions to this

Column B
a.Alpha particle
b.Gamma particle
c.Beta particle

a. Alpha particle (5. Is the same as a helium nucleus)

b. Gamma particle (6. Is pure energy)
c. Beta particle (9. Decreases the atomic number by 2)

4. c. Beta particle

5. a. Alpha particle
6. b. Gamma particle
7. a. Alpha particle
8. b. Gamma particle
9. c. Beta particle

To match the definitions to the corresponding particles in Column B, we need to understand the characteristics of each particle. Let's go through each definition and find the matching particle:

4. Is a negatively charged particle:
The particle that matches this definition is a Beta particle.

5. Is the same as a helium nucleus:
The particle that matches this definition is an Alpha particle.

6. Is pure energy:
The particle that matches this definition is a Gamma particle.

7. Increases the atom number by 1:
The particle that matches this definition is a Beta particle.

8. Has no effect on the atomic number:
The particle that matches this definition is a Gamma particle.

9. Decreases the atomic number by 2:
The particle that matches this definition is an Alpha particle.

So, to match the definitions to the corresponding particles in Column B:

4. Beta particle (c)
5. Alpha particle (a)
6. Gamma particle (b)
7. Beta particle (c)
8. Gamma particle (b)
9. Alpha particle (a)