Atomic structure

Question 1

What are the subatomic particles that make up an atom?

Answer 1

protons
neutrons
electrons

Question 2

What is the relative charge of protons, neutons and electrons

Answer 2

protons- +1
neutrons - 0
electrons - (-1)

Question 3

What is the relative mass of protons, neutrons and electrons?

Answer 3

protons - 1
neutrons- 1
electrons- 1/1840

Question 4

What are isotopes?

Answer 4

atoms of the same elements with different mass number due to their difference in neutrons. They have the same number of protons

Question 5

What are radioisotopes?

Answer 5

isotopes with an unstable nuclei and undergo radioactive decay.

Question 6

What are some used of radioisotopes?

Answer 6

carbon 14- dating- This is used to tell the age of living organisms. all organisms have a percentage of carbon 14 and when they die its ratio starts tp decrease. Measuring the amount left will determine the age of the organism.
cancer treatment/ radiotheraphy- colbalt 60 generate gamma rays that are used to destroy cancer cells
iodine 131 is used to treat thyroid cancer by injecting it into cancerous tumours.
Tracers- nitrogen 15 is used to track the movement and absorption of nitrogen in fertilizeers
technetium 99m- used to locate brain tumors and damaged heart cells .