Radioactivity & Particles (2017 Edexcel iGCSE)

How many neutrons does this fluorene isotope have? 

• 10
• 19
• 9
• 28

The atomic number of an atom indicates 

• the number of protons. 
• the number of neutrons. 
• the number of nucleons. 
• the number of electrons. 

The atomic mass of an atom indicates 

• the number of protons. 
• the number of neutrons. 
• the number of nucleons. 
• the number of electrons. 

From where in the atom is ionising radiation emitted? 

• Orbital shells. 
• Nuclei. 
• It depends on what type (α, β, or γ) the radiation is. 

The alpha particle is 

• a helium nucleus. 
• a helium atom. 
• a high-speed electron. 
• high-energy electromagnetic radiation. 

What atom is left behind after a Zinc-73 isotpe emits a beta particle? The atomic number of zinc is 30. 

• Z = 31, mass = 73
• Z = 29, mass = 73
• Z = 28, mass = 69
• Z = 28, mass = 73

What atom is left behind after a Thallium-181 isotpe emits an alpha particle? The atomic mass of thallium is 81. 

• Z = 79, mass = 177
• Z = 79, mass = 179
• Z = 79, mass = 96
• Z = 83, mass = 96

What atom is left behind after a Cobalt-60 isotpe emits a gamma ray? The atomic number of cobalt is 27. 

• Cobalt-60
• Cobalt-58
• Cobalt-61
• Cobalt-27

What detectors can detect all types of ionising radiation? 

• Photographic film and Geiger-Müller tube. 
• Geiger-Müller tube and spark counter. 
• Photographic film and cloud chamber. 
• Geiger-Müller tube and cloud chamber. 

The following is NOT a source of ionising background radiation. 

• Cell phones. 
• Cosmic Rays. 
• Radon Gas. 
• Rocks and Buildings.