Radioactivity 5

A nuclide has the symbol above .How many protons are there in one nucleus of this nuclide?

• 6

• 8

• 14

• 20

A lithium nucleus contains 3 protons and 4 neutrons.

What is its nuclide notation?

• 
• 
• 
• 

A particular nuclide of chlorine can be represented by the symbol shown.

37Cl

17

How many electrons are there in a neutral atom of this nuclide?

• 17

• 20

• 37

• 54

A nuclide is represented by the symbol ^P_Q X_.

How many neutrons are in one nucleus of the nuclide?

• P

• Q

• P + Q

• P – Q

Which statement about the nuclei of all atoms is correct?

• They are very small compared with the size of the atoms.

• They always contain the same number of protons as neutrons.

• They contain electrons, neutrons and protons.

• They have a total charge of zero.

The graph shows how the count rate on a detector due to a radioactive source changes with time.

What is the count rate at 5.0 hours?

• 960 counts per minute

• 600 counts per minute

• 150 counts per minute

• 0 counts per minute

The diagram represents a carbon atom.

What is the nucleon number (mass number) for this atom?

• 6

• 8

• 14

• 20

A nuclide is represented by the notation shown.

How many nucleons are there in one atom of this nuclide?

• P

• Q

• P + Q

• P - Q

A nucleus X has 17 protons and 18 neutrons.

Which notation is correct for this nucleus?

• 
• 
• 
• 

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

• 
• 
• 
•