Mass spectrometer - Study guides, Class notes & Summaries

3. the number of protons is equal to the number of electrons so the atom s atomically stable protons - Answer - -positive -the number of protons defines the element's atomic number electrons - Answer - -negative -equal to the number of protons neutrons - Answer - -neutral -all atoms of an element have the same number of protons but not necessarily the same number of neutrons (isotopes) mass number - Answer - the number of protons + neutrons in an atom's nucleus isotope...

past papers questions chemistry - November 2020 AS paper 1, 2017 paper 2 A level, paper 1 2019 A level Questions and Answers 100% Pass | Updated 2024 This question is about atomic structure.There is a general trend for an increase in ionisation energy across Period 3. Give one example of an element that deviates from this trend. Explain why this deviation occurs. - Correct Answer ️️ -Aluminium / Al(Outer) electron in (3)p orbital / sub-shell (level) (3p) higher in energy / slightly ...

Why is the GC so commonly used in cooperation with a Mass Spectrometer? - ️️These two components, used together, allow a much finer degree of substance identification than either unit used separately. It is not possible to make an accurate identification of a particular molecule by gas chromatography or mass spectroscopy alone.Sometimes two different molecules can also have a similar pattern of ionized fragments in a mass spectrometer (mass spectrum). Combining the two processes reduces the ...

OL Lab 13: Protein Synthesis Learning Objectives  Explain the translation process from mRNA to amino acid  Explain post-translational modification of proteins  Explain protein synthesis processing in the ribosome  Explain the primary, secondary, tertiary and quaternary structures of protein  Explain the basic principles of mass spectrometry (MALDI-TOF) Introduction In the Protein Synthesis lab, you will learn about the difference between protein synthesis in prokaryote (u...

What is another name for the mass number? ֎ -:- nucleon number What is another name for the atomic number? ֎ -:- proton number What is an isotope? ֎ -:- atom of the same element with the same atomic number, and a different number of neutrons How is relative atomic mass measured? ֎ -:- relative to the mass of 1/12 of a carbon-12 atom What charge are ions in a mass spectrometer? ֎ -:- +1 What unit is given by a mass spectrometer? E x c e l l e n c e i s k e y | 2 0 2 4 / 2 0 2 5 ...

State, in terms of electrons, the meaning of the term oxidising agent. [1] - ANSWER 1. Electron acceptor State two features of the current atomic model that are not shown in the Rutherford model. [2] - ANSWER 1. Nucleus containing protons and neutrons 2. Electrons in energy levels/orbitals The sample of chronium is analysed in a TOF mass spectrometer. Give two reasons why it is necessary to ionise the isotopes of chronium before they can be analysed in a TOF mass spectrometer. [2] - ANS...

AQA AS level Chemistry exam 2024 questions with 100% correct answers Nucleons - ANSWERS Protons and neutrons Electrons (location) - ANSWERS Surrounding the nucleus Relative mass of an electron - ANSWERS 1/1840 Strong nuclear force - ANSWERS The way protons and neutrons are held together in the nucleus Electrostatic forces - ANSWERS The attraction between protons and electrons that hold them together in the atom Atomic Number (Z) - ANSWERS The number of protons in the nucleus Mass nu...

AQA-7405-1-CHEMISTRY QUESTION PAPER 1-A-LEVEL-INORGANIC AND PHYSICAL CHEMISTRY-10Jun24. 0 1 This question is about atomic structure. 0 1 . 1 In 1897 JJ Thomson discovered the electron. He suggested that atoms were positively charged spheres with electrons embedded within them. Figure 1 represents an atom using Thomson’s model. Figure 1 Suggest the identity of this atom. Give two differences between the modern model of an atom and the Thomson model of an atom. [3 marks] Identity Di...

Allows us to determine the molecule mass and the molecular formula of a compound, as well as some of it's structural featuresMass Spectrometry Tells us the kinds of functional groups a compound hasInfrared (IR) Spectroscopy Provides information about the carbon-hydrogen framework of an organic compoundNuclear magnetic resonance (NMR) spectroscopy A very small sample is placed in a mass spectrometer, where it is vaporized and then ionized (electron removed from each molecule). Electron ...