Free Printable Ionisation and mass spectrometry

Worksheets

Ionisation and mass spectrometry

Total questions: 30

Worksheet time: 27mins

Name

Class

Date

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⁺

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?

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

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

100

95.9 g/mol

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

10.

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

³⁵Cl

³⁷Cl

⁷⁰Cl

⁷²Cl

11.

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

carbon-12.011

carbon-12

carbon-13

carbon-14

12.

What is the average atomic mass for this element?

10 amu

10.8 amu

19.9 amu

11 amu

13.

The average atomic mass rhenium, Re, is 186.21 amu.

If 37.1% of rhenium has mass of 185, what is the other stable isotope?

Rhenium-186

Rhenium-187

Rhenium-188

Rhenium-189

14.

The average atomic mass for nitrogen is 14.0067 amu. If you have a sample of nitrogen atoms, what is the chance that one randomly selected atom will have a mass of 14.0067 amu?

0.0%

0.0067%

90%

100%

15.

What kind of particles are used in mass spectrometry?

Anions

Cations

16.

Ionisation energy is the.....

maximum energy required to remove 1 electron from 1 mol of gaseous atoms

minimum energy required to remove 1 electron from 1 mol of gaseous atoms

first ionisation energy

energy required to remove an electron from 1 mol of molecules

17.

The trend for the first ionisation energy across a period is that it...

increases

decreases

remains constant

is random

18.

Factors affecting the ionisation energy:

Atomic radius

Effective nuclear charge

Shielding effect

All of the above

19.

After the atom is ionised, it then requires more energy to remove a second electron because the second electronis nearer the nucleus.

False

True

Not sure

20.

Full inner shells of electrons prevent the full nuclear charge being felt by the outer electrons.

True

False

Not sure

21.

The graph above shows the ionization energy values as the elements are arranged on the periodic table. Which conclusion cannot be drawn from the graph?

The ionization energy drops significantly as you move down a group because the valence electrons are in a shell further from the nucleus.

The ionization energy increases gradually as you move right across a period because the valence electrons are in a shell further from the nucleus.

The ionization energy increases gradually as you move right across a period because you are adding more protons.

The ionization energy increases when the valence electrons are more attracted to the nucleus.

22.

The bar graph above represents four elements and their respective ionization energies. Based on the organization of the modern periodic table, how would these elements be found on the periodic table?

They are in the same period with W being furthest left.

They are in the same period with W being furthest right.

They are in the same group with W being furthest to the bottom.

They are in a diagonal line with W being at the bottom right.

23.

Which of the following sequences corresponds to a correct trend in ionization energy?

Cl > S > P > Al

Sr > Ca > Mg > Be

Rb > K > Na > Li

Rb > Sr > I > Xe

24.

Which of the following is true about a sulfur atom and a chlorine atom?

Sulfur is larger and has higher ionization energy.

Sulfur is larger and has lower ionization energy.

Sulfur is smaller and has higher ionization energy.

Sulfur is smaller and has lower ionization energy.

25.

Put the following in order of increasing ionization energy:Neon, Lithium, Carbon

Lithium, Carbon, Neon

Carbon, Lithium, Neon

Neon, Carbon, Lithium

Lithium, Neon, Carbon

26.

The further an electron is from the nucleus, the

harder it is to pull it away

easier it is to pull it away

27.

Which of the following metals will be the most reactive (meaning that it is easiest to pull away its electron)

Caesium (Cs)

Sodium (Na)

Rubidium (Rb)

Lithium (Li)

28.

The correct order of sub-shell notation is:

1s, 2s, 2p, 2d, 3s, 3p, 4s, 3d, 4p

1s, 2s, 2p, 2d, 3s, 3p, 3d, 4s, 4p

1s, 2s, 2p, 3s, 3p, 3d, 4s, 4p

1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p

29.

Which term means particles which have the same electron configuration?

isotope

isoelectronic

isoelectric

isobar

30.

The trend for the first ionisation energy going down a group is that it...