AQA A-Level Chemistry (new spec) 1.1 Atomic Structure
Study online at https://quizlet.com/_22ip52
1. What are nucleons? Nucleons are protons and neutrons in the
nucleus.
2. What is the position of protons? Nucleus
3. What is the relative mass of a proton 1
4. What is the relative charge of a proton? +1
5. What is the position of neutrons? Nucleus
6. What is the relative mass of a neutron? 1
7. What is the relative charge of a neutron? 0
8. What is the position of electrons? Orbitals
9. What is the relative mass of an electron? 1/1800
10. What is the relative charge of an electron? -1
11. Define mass number Sum of protons and neutrons
12. Define atomic number The amount of protons in the nucleus
13. Number of neutrons is worked out by... Subtracting the atomic number from the
mass number
14. Define isotopes Atoms of the same element with the same
number of protons but a different amount of
neutrons
15. Isotopes have similar chemical properties they have the same electron configuration
because...
1/5
, AQA A-Level Chemistry (new spec) 1.1 Atomic Structure
Study online at https://quizlet.com/_22ip52
16. Isotopes have varying physical properties they have different masses
because...
17. Define ions A charged particle formed when an atom or
molecule gains or loses one or more elec-
trons
18. Define Relative Isotopic Mass The mass of an atom of a particular isotope
compared to 1/12 the mass of an atom of
carbon-12
19. Define Relative Atomic Mass (Ar) The average mass of an atom compared to
1/12 the mass of an atom of carbon-12
20. Define Relative Molecular Mass (Mr) The average mass of a molecule compared
to 1/12 the mass of an atom of carbon-12
21. Mass Spectrometer: Why is it kept in vacu- To prevents the ions produced colliding with
um conditions? molecules of air
22. Mass Spectrometer: What happens during The sample is dissolved in a volatile solvent
ionisation? and forced through a fine, hollow needle
which is connected to a positive terminal of
a high voltage supply. The sample is shot
with an electron gun, which knocks off an
electron, producing positively charged ions.
23. Mass Spectrometer: What happens during Positive ions are attracted to a negative-
acceleration? ly charged plate, causing them to acceler-
ate. Lighter ions with a higher charge move
faster
24. Mass Spectrometer: What happens during
ion drift?
2/5
Study online at https://quizlet.com/_22ip52
1. What are nucleons? Nucleons are protons and neutrons in the
nucleus.
2. What is the position of protons? Nucleus
3. What is the relative mass of a proton 1
4. What is the relative charge of a proton? +1
5. What is the position of neutrons? Nucleus
6. What is the relative mass of a neutron? 1
7. What is the relative charge of a neutron? 0
8. What is the position of electrons? Orbitals
9. What is the relative mass of an electron? 1/1800
10. What is the relative charge of an electron? -1
11. Define mass number Sum of protons and neutrons
12. Define atomic number The amount of protons in the nucleus
13. Number of neutrons is worked out by... Subtracting the atomic number from the
mass number
14. Define isotopes Atoms of the same element with the same
number of protons but a different amount of
neutrons
15. Isotopes have similar chemical properties they have the same electron configuration
because...
1/5
, AQA A-Level Chemistry (new spec) 1.1 Atomic Structure
Study online at https://quizlet.com/_22ip52
16. Isotopes have varying physical properties they have different masses
because...
17. Define ions A charged particle formed when an atom or
molecule gains or loses one or more elec-
trons
18. Define Relative Isotopic Mass The mass of an atom of a particular isotope
compared to 1/12 the mass of an atom of
carbon-12
19. Define Relative Atomic Mass (Ar) The average mass of an atom compared to
1/12 the mass of an atom of carbon-12
20. Define Relative Molecular Mass (Mr) The average mass of a molecule compared
to 1/12 the mass of an atom of carbon-12
21. Mass Spectrometer: Why is it kept in vacu- To prevents the ions produced colliding with
um conditions? molecules of air
22. Mass Spectrometer: What happens during The sample is dissolved in a volatile solvent
ionisation? and forced through a fine, hollow needle
which is connected to a positive terminal of
a high voltage supply. The sample is shot
with an electron gun, which knocks off an
electron, producing positively charged ions.
23. Mass Spectrometer: What happens during Positive ions are attracted to a negative-
acceleration? ly charged plate, causing them to acceler-
ate. Lighter ions with a higher charge move
faster
24. Mass Spectrometer: What happens during
ion drift?
2/5
