IB Chemistry Topic 2

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-PS2-5

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

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

What is the average atomic mass for this element?

• 10 amu
• 10.8 amu
• 19.9 amu
• 11 amu

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

The electron configuration of an atom is 1s²2s²2p⁶.  The number of electrons in the atom is 

• 3
• 6
• 8
• 10

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What atom matches this electron configuration?
1s²2s²2p⁶3s²3p⁶4s²3d¹⁰

• Zinc
• Copper
• Nickel
• Germanium

Tags

NGSS.HS-PS1-1

What is the noble gas shorthand electron for Sulfur atom?

• [Ar] 3p⁴
• [He] 3s²3p⁴
• [Ne] 3s²3p⁴
• [Na] 3s²3p⁴
  

Tags

NGSS.HS-PS1-1