Atoms and Isotopes

Question 1

What is molecular ion peak?

Answer 1

• mass of whole molecule in sample that hasn’t been fragmented
• usually an extremely small percentage with w higher mass than the rest

Question 2

What is the M+1 peak?

Answer 2

• Higher mass by one that ‘molecular ion peak’ due to the isotope of an atom in molecule

Question 3

What is relative isotopic mass?

Answer 3

Mass of an atom of an isotope compared to 1/12 mass of carbon-12

Question 4

What are the uses of mass spectrometry?

Answer 4

• identifies unknown compounds
• determines the abundance of isotopes in an element
• more knowledge about structure and chemical properties of molecules