mass spectrometer(AS)

What do the peaks on the mass spectrum represent?

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

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

Use your periodic table.  There are two isotopes of rubidium: ⁸⁵Rb and ⁸⁷ Rb. Which is more abundant?

• equally abundant
• rubidium-85
• rubidium-85.47
• rubidium-87

Tags

NGSS.HS-PS1-1

Carbon has three known isotopes. Which is the most abundant?

• carbon-12.011
• carbon-12
• carbon-13
• carbon-14

What is the average atomic mass for this element?

• 10 amu

• 10.2 amu

• 19.9 amu

• 11 amu

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

The average atomic mass rhenium, Re, is 186.21 amu. If 37.1% of rhenium has mass# = 185, what is the other stable isotope?

• Rhenium-183
• Rhenium-181
• Rhenium-187
• Rhenium-189

Tags

NGSS.HS-PS1-8

How are atoms ionised by the mass spectrometer?

• by being hit with high-speed electrons
• by having electrons added to them
• by exposing to an electric field

What affects the deflection in a mass spectrometer?

• the mass and charge of the ion
• the mass of the ion only
• the charge of the ion only
• the velocity of the ion

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-5