8.3 Isotopes

Which of the following elements are false about isotopes?

• have different physical properties

• have the same number of electrons

• have different chemical properties

• have different number of neutrons

Which of the followings isotopes is used in the medical field?

• Carbon-14

• Iodine-131

• Uranium-235

• Phosphorus-32

What is the use of Cobalt-60 in the food technology field?

• destroy microorganisms in the vegetables

• provide extra nutrients in food

• increase the rate of absorption of fertiliser

• preserve food

Which of the following elements are the pair of isotopes?

• P and Q

• P and R

• Q and S

• R and S

The nucleus of atom X contains

• 6 protons and 14 neutrons

• 14 protons and 6 neutrons

• 8 protons and 6 neutrons

• 6 protons and 8 neutrons

What is the name of this isotope?

• Cobalt-60

• Phosphorus-32

• Uranium-235

• Amercium-241

What is the radioactive substance used in the power station?

• Carbon-14

• Uranium-235

• Iodine-131

• Cobalt-60

State the definition of isotopes.

Given the number of neutrons for sodium-24 is 13, determine the number of protons and the nucleon number of the isotope.

Number of proton: ______________

Nucleon number: _______________

State one field that involves the use of Carbon-14.