23.2 Radioactivity2

Question 1

• A
• B
• C
• D

Question 2 A certain element has several isotopes. Which statement about these isotopes is correct?

• A They must have different numbers of electrons orbiting their nuclei.
• B They must have the same number of neutrons in their nuclei.
• C They must have the same number of nucleons in their nuclei.
• D They must have the same number of protons in their nuclei.

Question 3

• A alpha particles matter is made up of atoms
• B alpha particles atoms have a very small nucleus
• C beta particles matter is made up of atoms
• D beta particles atoms have a very small nucleus

Question 4

• A nuclide 1 and nuclide 2
• B nuclide 2 and nuclide 3
• C nuclide 2 and nuclide 5
• D nuclide 4 and nuclide 5

Question 5 Below are four statements about isotopes of a certain element. Which statement about the isotopes must be correct?

• A They are radioactive.
• B They are unstable.
• C They have the same number of neutrons.
• D They have the same number of protons.

Question 6 Which diagram represents an experiment that provided evidence for the nuclear atom?

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Question 7

• A because they always travel more slowly.
• B because they are heavier.
• C because they are larger in diameter.
• D because they have a positive charge.

Question 8

• A aluminium
• B copper
• C lead
• D steel

Question 9

• A are the only type of radiation to carry a charge.
• B have the greatest ionising effect.
• C have the greatest penetrating effect.
• D have the smallest mass.

Question 10 In a cathode-ray tube, a hot tungsten cathode releases particles by thermionic emission. What are these particles?

• A alpha particles
• B electrons
• C protons
• D tungsten atoms