HSSC-I Chem 23 dec

Which quantum number describes the energy level of an electron in an atom?

• n
• l
• m
• s

Which quantum number determines the orbital shape of an electron?

• n
• l
• m
• s

What is the spin quantum number (s) for an electron?

• -1/2 to +1/2
• +1 to -1
• 0 to 1
• + 1/2 only

What is the range of values for the magnetic quantum number (m)?

• -l to +l
• 0 to +1
• -1 to +1
• -n to +n

How many orbitals are possible for an electron with a principal quantum number (n) of 3?

• 1
• 3
• 9
• 18

What is the primary purpose of the ionization source?

• Separate ions
• Detect ions
• Convert molecules to ions
• Fragment ions

Which MS technique is used for large biomolecules?

• GC-MS
• LC-MS
• MALDI
• EI

What is the m/z ratio?

• Mass to charge
• Charge to mass
• Mass to molecular weight
• Molecular weight to mass

What type of field does a quadrupole mass analyzer use?

• Magnetic
• electric
• Quadrupole electric
• Both

What is the purpose of the detector?

• Ionize molecules
• Separate ions
• Detect ions
• Fragment ions