Chapter 1 - Steven
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What is the symbol of the proton?
P
What is the symbol of a neutron?
n
What is the symbol of an electron?
e-
What is the relative mass of a proton?
1
What is the relative mass of a neutron?
1
What is the relative mass of an electron?
1 / 1840
What is the relative charge of a proton?
+1
What is the relative charge of a neutron?
0
What is the relative charge of an electron?
-1
Where are protons located in the atom?
In the nucleus of the atom
Where are neutrons located in the atom?
In the nucleus of the atom
Where are electrons located in the atom?
In energy levels surrounding the nucleus
What does the nucleus contain?
Protons and neutrons
What is the atomic number?
The number of protons and electrons
What is the mass number?
The number of protons + number of neutrons
What are isotopes?
Different forms of the same element with different masses
What do all isotopes contain?
The same number of protons
What is the relative isotopic mass?
The mass of an atom of an isotope compared with 1/12th the mass of an atom of carbon-12
Why is the mass number and relative isotopic not always the same?
Because the isotopic mass number is not always a whole number as it is relative to the mass of carbon-12.
What is the relative atomic mass?
The weighted mean mass of an atom of an element compared to 1/12 of the mass of an atom of carbon-12.
What is the difference between the atomic mass and the isotopic mass?
The isotopic mass is from 1 isotope, whereas the atomic mass is taken from all the isotopes
What does a mass spectrometer measure?
The masses of atoms and molecules
What is the molecular ion peak?
The peak with the highest mass:intensity ratio on the spectrum
What are quantam shells?
Well-defined energy levels that