Mass Spectroscopy Practice

What are the steps of operation in the mass spectrometer?

• Accelerate, Deflect,Ionize, Detect
• Deflect,Ionize, Accelerate, Detect
• Ionize, Accelerate, Deflect, Detect
• Detect, Accelerate, Deflect, Ionize

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Which species would get deflected by the greatest degree in the mass spectrometer?

• ¹²C⁺
• ¹³C⁺
• ¹³C²⁺
• ¹⁴C⁺

Tags

NGSS.HS-PS2-1

NGSS.HS-PS3-5

What do the peaks on the mass spectrum represent?

• anions
• different isotopes
• atoms with differing numbers of electrons
• numbers of electrons

Which element does this mass spectrum most likely represent?

• neon
• scandium
• boron
• sodium

Tags

NGSS.HS-PS1-1

What do the heights of the peaks represent in the mass spectrum?

• number of isotopes
• relative abundance of each isotope
• average atomic mass
• charge:mass ratio

How many isotopes are shown in this mass spectrum?

• 1
• 84
• 86
• 4

What do you expect the molar mass to be for this element?

• 91.4 g/mol
• 90.0 g/mol
• 4 g/mol
• 50. g/mol

Tags

NGSS.HS-PS1-7

How many isotopes of this element are shown in the mass spectrum?

• 98
• 7
• 100
• 95.9 g/mol

Tags

NGSS.HS-PS1-8

A sample of pure chlorine gas is analyzed in the MS. Which of the following is a correct interpretation?

• Chlorine has an isotope with a mass of 70 amu
• Chlorine has three known isotopes
• Chlorine is diatomic
• Chlorine is highly reactive

Based on the mass spectrum, which isotope of chlorine is most abundant?

• ³⁵Cl

• ³⁷Cl

• ⁷⁰Cl

• ⁷²Cl