Atomic Structure - 3
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1
What is the proton/atomic number?
the number of protons in the nucleus of an atom
2
What is the nucleon/mass number?
the total number of protons and neutrons in a nucleus.
3
What is the top left number in nuclide notation?
nucleon/mass number
4
What is the bottom left number in nuclide notation?
proton/atomic number
5
What is the top right number in nuclide notation?
charge of ion
6
What is the bottom right number in nuclide notation?
number of atoms in molecule
7
What is an ion
A particle formed when an atom gains or loses electrons while the number of protons and neutrons remain the same
8
When an ion has a charge of +2, how does it have more or less electrons
less electrons
9
What is an isotope?
atoms with the same number of protons but different number of neutrons
10
Where are electrons found in an atom?
In electron shells around the nucleus
11
Which electron shell has the lowest energy?
The one closest to the nucleus
12
How many electrons can the first electron shell store
2
13
How many electrons can each of the rest of the electron shells store
8
14
What is another name for the outermost electron shell
Valence shell with the electrons in it being valence electrons
15
Under what condition is an atom reactive?
When the valence shell is not full
16
What is the name for atoms which are not reactive?
Noble gases
17
If an atom has 11 electrons, what is its electronic configuration
2,8,1
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