General Science Class 10

The symbol denotes the proton number is :

1. P
2. N
3. Z
4. A

The number of neutron(s) in Protium is :

1. One
2. Three
3. Two
4. No

If an element B has five protons and six neutrons what will be the symbol of element B :

1. 115B
2. 11B
3. 115B
4. None

The α-radiation is :

1. A stream of fast-moving electrons
2. A form of electromagnetic radiation
3. Highly ionizing than γ-radiation
4. More penetrating than β-radiation

A radioactive nuclide emits a β-particle. The atomic number (proton number) of the nucleus number of :

1. Stays the same
2. Decreases by 2
3. Increases by 1
4. Decreases by 4

A radioactive element emits a particle from the nucleus of one of its atoms. The particle comprises two protons and two neutrons. The name of this process is called?

1. α-emission
2. β-emission
3. γ-emission
4. Nuclear fission

The type of radiation that travels in a straight line across an electric field is a/an?

1. Proton
2. Electron
3. α-particle
4. γ-particle

A powder contains 100mg of a radioactive material that emits α-particles. (See in detail)

1. 0mg
2. 25mg
3. 50mg
4. 75mg

The main source of energy in the stars is :

1. Chemical reaction
2. Nuclear fission
3. Nuclear fusion
4. Mechanical energy

The splitting of a heavy nucleus into smaller nuclei is called?

1. Fusion
2. Fission
3. Half-life
4. Gamma decay