Ionisation and mass spectrometry

What are the steps of operation in the mass spectrometer?

• Accelerate,Flight, Ionise, Detect

• Flight, Ionise, Accelerate, Detect

• Ionise, Accelerate, Flight, Detect

• Detect, Accelerate, Flight, Ionize

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 represent?

• neon

• scandium

• boron

• sodium

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

Tags

NGSS.HS-PS1-8