CBSE Class 9 Science Journey Inside the Atom (Class 9 NCERT New) Quiz 6

1. What number is circled?

A Number of Neutrons B Number of Protons C Atomic Mass D Number of Electrons

2. How many electrons does an atom of Krypton have?

A 36 B 83.80 C 47.80 D 119.80

3. What is the atomic mass of Iron?

A 26 B 55.845 C 56 D 30

4. How many electrons are in a gold atom?

A 79 B 196 C 117 D 275

5. What is the atomic mass of Helium

A 4 B 2 C 6 D 1

6. How many electrons does a Copper atom have?

A 63 B 29 C 92 D 34

7. How many protons are in Beryllium?

A 4 B 9 C 5 D 2

8. What is the atomic mass of Sodium?

A 11 B 22.9898 C 33.9898 D 11.9898

9. What number indicates the nucleus?

A 1 B 2 C 3 D 4

10. Oxygen’s atomic number is 8. This means that an oxygen atom must have

A 8 electrons B 8 protons C 8 neutrons D a mass number of 8