Waec Chemistry Past Questions For Year 2009
Question 51
Which of the following noble gases has electronic structure similar to that of N in NH 3? [\(\frac{14}{7}\)N]
- A. 2He
- B. 10Ne
- C. 18Ar
- D. 36Kr
Question 52
Which of the following elements exhibits the same chemical properties as the atom \(\frac{35}{17}\)X? An element with
- A. atomic number 17
- B. atomic number 18
- C. mass number 35
- D. mass number 52
Question 53
An important medical use of nuclear radiations is
- A. activation analysis
- B. carbon dating
- C. radiotherapy
- D. tissue regeneration
