Atomic Structure Flashcards
Define Isotope
Same number of protons but a different number of neutrons
Define ion
A charged particle with more/fewer electrons than protons
In the periodic table symbols what are A and Z
A is the mass number
Z is the atomic number
Define Nucleon
Particles in the nucleus
Define Element
A chemical (molecule or atoms) made up of 1 type of atom, all with the same number of protons
What’s the equation to calculate the number of neutrons?
N = A - Z
Where A is the mass number and Z is the atomic number
What’re the 2 points you need to make for the model answer about the models of the atom
The current model has:
Neutrons and Protons in the nucleus,
Electrons orbit the nucleus in different energy levels
Define Relative Molecular Mass
The average weighed mass of one molecule compared to 1/12th the mass of one atom of carbon 12
Define Relative Atomic Mass
The average weighed mass of one atom compared to 1/12th the mass of one atom of carbon 12
What’s the equation to calculate relative atomic mass?
𝑅𝐴𝑀= (∑(𝑚𝑎𝑠𝑠 𝑥 𝑎𝑏𝑢𝑛𝑑𝑎𝑛𝑐𝑒))/(𝑡𝑜𝑡𝑎𝑙 𝑎𝑏𝑢𝑛𝑑𝑎𝑛𝑐𝑒)
Total abundance is all abundances added together
What should be done if there are 2 unkown abundances in a RAM calculation?
Scaffold
Solve simultaneously, by creating an equation showing the left over %s in terms of x+y and rearranging
Model Answer describing Electron Impact
(for atoms/small molecules)
High energy electrons
From electron gun.
Fired at sample.
Knocks off one electron.
Has to happen in the gas phase.
Equation for electron impact with state symbols
M(g) –> M(g)+ + e-
Model Answer for Electrospray
Sample dissolved in volatile polar solvent
Injected as an aerosol through needle
Needle has a high positive charge
Sample gains a H+ ion
Equation for Electrospray
With state symbols
M(g)+ H^+(g) –> MH^+(g)