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Atom Practical Review
Name the subatomic particles?
Protons, Neutron, and Electrons.
What two subatomic particles belong in the nucleus?
Protons and Neutrons
Which subatomic particle has a positive charge?
Protons
Which subatomic particle has a negative charge?
Electrons
Which subatomic particle has a neutral charge?
Neutrons
Subatomic Particle Charges•Positive Proton•Neutral Neutron•Negative Electron
Where are the electrons located?
Outside the nucleus in the Electron Cloud.
What is the atomic number?
The number of protons in the nucleus.
What is the atomic mass?
The number of protons and neutrons in the nucleus.
How do we find/calculate the number of neutrons in an
atom?
Subtract the number of protons from the atomic mass.
(#neutrons = mass - # protons)
How many electrons can go in the 1st energy level in the electron
cloud?
2
How many electrons can go in the 2nd energy level in the electron
cloud?
8
How many electrons can go in the 3rd energy level in the electron
cloud?
8 or more
What do the groups in the periodic table tell us?
The number of valence electrons in an atom.
What is a valence electron?
Electrons in the outer most energy level. (Valence Shell)
What is a stable atom?
An atom with the same number of protons and electrons.
How many protons should this stable atom have?
7P = ? N= 7
What element is this an atom of?
NitrogenP = 7 N= 7
How many neutrons does this atom have?
5P = 4 N= ?
What element is this an atom of?
OxygenP = 8 N= ?
What is wrong with this stable atom?
Not enough electrons.
P = 13 N= 14
What do the periods in the periodic table tell us?
The number of energy levels in an atom.
What period does this atom belong to?
3P = 13 N= 14
How many protons should this stable atom have?
9P = ? N= 10
What is wrong with this atom?
Only 1 electron in the 1st energy level.
P = 9 N= 10
What period does this atom belong to?
1P =N=
How many protons should this stable atom have?
3P = ? N= 4
How many neutrons does this atom have?
8P = 8 N= ?
How many protons should this stable atom have?
11P = ? N=
How many valance electrons does this atom have?
6P = N=
What group does this atom belong to?
16P = N=
What is wrong with this stable atom?
Wrong number of electrons in the 2nd
energy level.
P = 12 N= 12
Based on the valence electrons this atom belongs in ________.
Group 15P = N=
What is wrong with this stable atom?
There should 22 neutrons.
P = 18 N= 21
Based on the energy levels in the electron cloud, this atom belongs
in _________.
Period 3P = N=
What element is this stable atom of?
BoronP = ? N= 6
What group does atom belong to?
1P = N=
Based on the electrons in this Bohr Model, this is a stable atom
of _________.
Argon
P = ? N=
